good science experiments for high school

18 Must-Try Science Experiments for High School: From Basic Chemistry to Complex Reactions

Learners of all ages are enamored with scientific experiments:

P5 have been looking at changes of state in science, and today investigated the water cycle! We did an experiment with water & food colouring in a plastic bag to see if we could see any changes, and noticed signs of evaporation and condensation inside the bag @SLC_RAiSE #Science pic.twitter.com/cla3opitiT — Burgh Primary School (@BurghPrimary) October 25, 2023

This article will equip high school teachers with an arsenal of exciting science experiments that will keep their students engaged and learning. Offering projects across a variety of disciplines, from physics to biology, this carefully curated list will be suitable for learners at any level. By incorporating these experiments into their lesson plans, educators will be providing their students with valuable hands-on experience that complements their textbook knowledge. With easy-to-follow instructions and materials that are easily accessible, teaching science has never been more enjoyable!

Experiment 1: Investigating Osmosis with Potato Slices

This accompanying video offers a visual guide on how this osmosis project is conducted using potatoes. By the end, students will have a vivid understanding of osmotic movement and its effects.

Experiment 2: Making a Homemade Volcano

High school students have a wonderful opportunity to step into the shoes of a scientist with this exciting and educational experiment. They can construct their very own volcanic eruption, right from the safety of their classroom or home! By synergizing baking soda with vinegar, students will get a firsthand view of a thrilling chemical reaction that mimics the grandeur of a volcanic eruption. Beyond the sheer fun and spectacle, this experiment serves as an enlightening experience, imparting deeper insights into the complex world of chemical reactions.

Experiment 3: Exploring Density with Oil and Water

Experiment 4: building a simple electric motor.

High school students possess an innate curiosity, constantly seeking to understand the world around them. Dive deep into the captivating realm of electromagnetism with this enlightening project, revealing the intricate process that enables an electric motor to effortlessly transform electrical impulses into tangible mechanical movements. As students embark on this hands-on journey, they’ll gain an intimate appreciation for the underlying principles that power much of today’s technology.

Experience the mesmerizing magnificence of an electric motor as this video unravels the mystery behind its seamless conversion of electrical energy into mechanical power. Unlock the inner workings of this wonder machine in the science projects for high school.

Experiment 5: Testing Acids and Bases with Red Cabbage

Experiment 6: observing microorganisms with a microscope, experiment 7: studying chemical reactions with alka-seltzer experiment, experiment 8: measuring the speed of light with a microwave oven, experiment 9: demonstrating newton’s third law of motion with balloons, experiment 10: observing the greenhouse effect with sunlight and jars, experiment 11: investigating chromatography with markers, experiment 12: creating a simple electromagnet, experiment 13: examining photosynthesis with leaf disks, experiment 14: extracting dna from strawberries, experiment 15: building a mini tesla coil, additional 3 fun science experiments for high school, experiment 16: making invisible ink with lemon juice, experiment 17: creating rainbow fire with salt, experiment 18: exploring bioluminescence with glowing bacteria, useful science experiments resources, leave a comment cancel reply.

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45 Cool Chemistry Experiments, Demos, and Science Fair Projects

Don’t forget your safety equipment!

Bunsen burners, colorful chemicals, and the possibility of a (controlled) explosion or two? Everybody loves chemistry experiments! We’ve rounded up the best activities, demos, and chemistry science fair projects for kids and teens. Try them in the classroom or at home.

Easy Chemistry Experiments and Activities for All Ages

Chemistry science fair projects.

These chemistry experiments and activities are all easy to do using simple supplies you probably already have. Families can try them at home, or teachers and students can do them together in the classroom.

Mix up some magic milk

Kids love this colorful experiment, which explores the concept of surface tension. This is one of our favorite chemistry experiments to try at home, since the supplies are so basic and the results are so cool!

Taste the Rainbow

Teach your students about diffusion while creating a beautiful and tasty rainbow. You’ll definitely want to have extra Skittles on hand so your class can enjoy a few as well!

Learn more: Skittles Diffusion

Crystallize sweet treats

Crystal science experiments teach kids about supersaturated solutions. This one is easy to do at home, and the results are absolutely delicious!

Learn more: Candy Crystals

Make elephant-sized toothpaste

This fun project uses yeast and a hydrogen peroxide solution to create overflowing “elephant toothpaste.” You can also add an extra fun layer by having kids create toothpaste wrappers for their plastic bottles.

Blow the biggest bubbles you can

Add a few simple ingredients to dish soap solution to create the largest bubbles you’ve ever seen! Kids learn about surface tension as they engineer these bubble-blowing wands.

Learn more: Giant Soap Bubbles

Demonstrate the “magic” leakproof bag

So simple and so amazing! All you need is a zip-top plastic bag, sharp pencils, and some water to blow your kids’ minds. Once they’re suitably impressed, teach them how the “trick” works by explaining the chemistry of polymers.

Learn more: Leakproof Bag

Use apple slices to learn about oxidation

Have students make predictions about what will happen to apple slices when immersed in different liquids, then put those predictions to the test! Finally, have them record their observations.

Learn more: Apple Oxidation

Float a marker man

Their eyes will pop out of their heads when you “levitate” a stick figure right off the table. This experiment works due to the insolubility of dry-erase marker ink in water, combined with the lighter density of the ink.

Learn more: Floating Marker Man

Discover density with hot and cold water

There are a lot of easy science experiments you can do with density. This one is extremely simple, involving only hot and cold water and food coloring, but the visuals make it appealing and fun.

Learn more: Layered Water

Layer more liquids

This density demo is a little more complicated, but the effects are spectacular. Slowly layer liquids like honey, dish soap, water, and rubbing alcohol in a glass. Kids will be amazed when the liquids float one on top of the other like magic (except it is really science).

Learn more: Layered Liquids

Grow a carbon sugar snake

Easy science experiments can still have impressive results. This eye-popping chemical reaction demonstration only requires simple supplies like sugar, baking soda, and sand.

Learn more: Carbon Sugar Snake

Make homemade bouncy balls

These homemade bouncy balls are easy to make since all you need is glue, food coloring, borax powder, cornstarch, and warm water. You’ll want to store them inside a container like a plastic egg because they will flatten out over time.

Learn more: Make Your Own Bouncy Balls

Create eggshell chalk

Eggshells contain calcium, the same material that makes chalk. Grind them up and mix them with flour, water, and food coloring to make your very own sidewalk chalk.

Learn more: Eggshell Chalk

Make naked eggs

This is so cool! Use vinegar to dissolve the calcium carbonate in an eggshell to discover the membrane underneath that holds the egg together. Then, use the “naked” egg for another easy science experiment that demonstrates osmosis .

Learn more: Naked Egg Experiment

Turn milk into plastic

This sounds a lot more complicated than it is, but don’t be afraid to give it a try. Use simple kitchen supplies to create plastic polymers from plain old milk. Sculpt them into cool shapes when you’re done.

Test pH using cabbage

Teach kids about acids and bases without needing pH test strips. Simply boil some red cabbage and use the resulting water to test various substances—acids turn red and bases turn green.

Learn more: Cabbage pH

Clean some old coins

Use common household items to make old oxidized coins clean and shiny again in this simple chemistry experiment. Ask kids to predict (hypothesize) which will work best, then expand the learning by doing some research to explain the results.

Learn more: Cleaning Coins

Blow up a balloon (without blowing)

Chances are good you probably did easy science experiments like this when you were in school yourself. This well-known activity demonstrates the reactions between acids and bases. Fill a bottle with vinegar and a balloon with baking soda. Fit the balloon over the top, shake the baking soda down into the vinegar, and watch the balloon inflate.

Learn more: Balloon Experiments

Assemble a DIY lava lamp

This 1970s trend is back—as an easy science experiment! This activity combines acid/base reactions with density for a totally groovy result.

Explore how sugary drinks affect teeth

The calcium content of eggshells makes them a great stand-in for teeth. Use eggs to explore how soda and juice can stain teeth and wear down the enamel. Expand your learning by trying different toothpaste and toothbrush combinations to see how effective they are.

Learn more: Sugar and Teeth Experiment

Mummify a hot dog

If your kids are fascinated by the Egyptians, they’ll love learning to mummify a hot dog. No need for canopic jars ; just grab some baking soda and get started.

Extinguish flames with carbon dioxide

This is a fiery twist on acid-base experiments. Light a candle and talk about what fire needs in order to survive. Then, create an acid-base reaction and “pour” the carbon dioxide to extinguish the flame. The CO2 gas acts like a liquid, suffocating the fire.

Send secret messages with invisible ink

Turn your kids into secret agents! Write messages with a paintbrush dipped in lemon juice, then hold the paper over a heat source and watch the invisible become visible as oxidation goes to work.

Learn more: Invisible Ink

Set popcorn dancing

This is a fun version of the classic baking soda and vinegar experiment, perfect for the younger crowd. The bubbly mixture causes popcorn to dance around in the water.

Learn more: Dancing Popcorn Experiment

Shoot a soda geyser sky-high

You’ve always wondered if this really works, so it’s time to find out for yourself! Kids will marvel at the chemical reaction that sends diet soda shooting high in the air when Mentos are added.

Learn more: Mentos and Coke Experiment

All of these chemistry experiments are perfect for using the scientific method. Form a hypothesis, alter the variables, and then observe the results! You can simplify these projects for younger kids, or add more complexity for older students.

Break apart covalent bonds

Difficulty: Medium / Materials: Medium

Break the covalent bond of H 2 O into H and O with this simple experiment. You only need simple supplies for this one. Turn it into a science fair project by changing up the variables—does the temperature of the water matter? What happens if you try this with other liquids?

Learn more: Breaking Covalent Bonds

Measure the calories in various foods

Are the calorie counts on your favorite snacks accurate? Build your own calorimeter and find out! This kit from Home Science Tools has all the supplies you’ll need.

Detect latent fingerprints

Forensic science is engrossing and can lead to important career opportunities too. Explore the chemistry needed to detect latent (invisible) fingerprints, just like they do for crime scenes!

Learn more: Fingerprints Project

Use Alka-Seltzer to explore reaction rate

Difficulty: Easy / Materials: Easy

Tweak this basic concept to create a variety of high school chemistry science fair projects. Change the temperature, surface area, pressure, and more to see how reaction rates change.

Determine whether sports drinks really have more electrolytes than other beverages

Difficulty: Medium / Materials: Advanced

Are those pricey sports drinks really worth it? Try this experiment to find out. You’ll need some special equipment for this one; buy a complete kit at Home Science Tools .

Turn flames into a rainbow

You’ll need to get your hands on a few different chemicals for this experiment, but the wow factor will make it worth the effort. Make it a science project by seeing if different materials, air temperature, or other factors change the results.

Discover the size of a mole

The mole is a key concept in chemistry, so it’s important to ensure students really understand it. This experiment uses simple materials like salt and chalk to make an abstract concept more concrete. Make it a project by applying the same procedure to a variety of substances, or determining whether outside variables have an effect on the results.

Learn more: How Big Is a Mole?

Cook up candy to learn mole and molecule calculations

This edible experiment lets students make their own peppermint hard candy while they calculate mass, moles, molecules, and formula weights. Tweak the formulas to create different types of candy and make this into a sweet science fair project!

Learn more: Candy Chemistry

Make soap to understand saponification

Take a closer look at an everyday item: soap! Use oils and other ingredients to make your own soap, learning about esters and saponification. Tinker with the formula to find one that fits a particular set of parameters.

Learn more: Saponification

Uncover the secrets of evaporation

Explore the factors that affect evaporation, then come up with ways to slow them down or speed them up for a simple science fair project.

Learn more: Evaporation

More Chemistry Experiment Science Fair Ideas

These questions and prompts can spark ideas for unique chemistry experiments:

• Compare the properties of sugar and artificial sweeteners.
• Explore the impact of temperature, concentration, and seeding on crystal growth.
• Test various antacids on the market to find the most effective product.
• What is the optimum temperature for yeast production when baking bread from scratch?
• Compare the vitamin C content of various fruits and vegetables.
• How does temperature affect enzyme-catalyzed reactions?
• Investigate the effects of pH on an acid-base chemical reaction.
• Devise a new natural way to test pH levels (such as cabbage leaves).
• What’s the best way to slow down metal oxidation (the form of rust)?
• How do changes in ingredients and method affect the results of a baking recipe?

Like these chemistry experiments? Don’t miss STEM Activities for Kids of All Ages and Interests .

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You Might Also Like

70 Best High School Science Fair Projects in Every Subject

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Okay, this is the hardest part of the whole project…picking your topic. But here are some ideas to get you started. Even if you don’t like any, they may inspire you to come up with one of your own. Remember, check all project ideas with your teacher and parents, and don’t do any project that would hurt or scare people or animals. Good luck!

• Does music affect on animal behavior?
• Does the color of food or drinks affect whether or not we like them?
• Where are the most germs in your school? ( CLICK for more info. )
• Does music have an affect on plant growth?
• Which kind of food do dogs (or any animal) prefer best?
• Which paper towel brand is the strongest?
• What is the best way to keep an ice cube from melting?
• What level of salt works best to hatch brine shrimp?
• Can the food we eat affect our heart rate?
• How effective are child-proof containers and locks.
• Can background noise levels affect how well we concentrate?
• Does acid rain affect the growth of aquatic plants?
• What is the best way to keep cut flowers fresh the longest?
• Does the color of light used on plants affect how well they grow?
• What plant fertilizer works best?
• Does the color of a room affect human behavior?
• Do athletic students have better lung capacity?
• What brand of battery lasts the longest?
• Does the type of potting soil used in planting affect how fast the plant grows?
• What type of food allow mold to grow the fastest?
• Does having worms in soil help plants grow faster?
• Can plants grow in pots if they are sideways or upside down?
• Does the color of hair affect how much static electricity it can carry? (test with balloons)
• How much weight can the surface tension of water hold?
• Can some people really read someone else’s thoughts?
• Which soda decays fallen out teeth the most?
• What light brightness makes plants grow the best?
• Does the color of birdseed affect how much birds will eat it?
• Do natural or chemical fertilizers work best?
• Can mice learn? (you can pick any animal)
• Can people tell artificial smells from real ones?
• What brands of bubble gum produce the biggest bubbles?
• Does age affect human reaction times?
• What is the effect of salt on the boiling temperature of water?
• Does shoe design really affect an athlete’s jumping height?
• What type of grass seed grows the fastest?
• Can animals see in the dark better than humans?

Didn’t see one you like? Don’t worry…look over them again and see if they give you an idea for your own project that will work for you. Remember, find something that interests you, and have fun with it.

To download and print this list of ideas CLICK HERE .

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Science fairs and high school labs are excellent opportunities for students to explore and expand their scientific knowledge. Not only do these experiences allow students to apply what they have learned in the classroom, but they also foster a passion for science and critical thinking skills. If you’re looking for some exciting and engaging science experiments to showcase at your next science fair or conduct in your high school lab, you’ve come to the right place. In this article, we will explore 15 of the best science experiments that are perfect for high school students.

1. Electrolysis of Water: Explore the process of water electrolysis and demonstrate how water can be split into hydrogen and oxygen gases.

2. Acid-Base Titration: Investigate the concept of neutralization reactions by performing acid-base titrations using different indicators.

3. Solar Cell Efficiency: Measure the efficiency of solar cells by comparing the electrical output under different light sources and angles.

4. Enzyme Activity: Study the effect of temperature and pH on enzyme activity using a common enzyme such as catalase.

5. DNA Extraction: Extract DNA from various plant or fruit samples to understand the basic principles of DNA isolation.

6. Chromatography: Separate and analyze the pigments present in plant leaves using paper or thin-layer chromatography.

7. Boyle’s Law: Observe the relationship between the volume and pressure of a fixed amount of gas at a constant temperature.

8. Projectile Motion: Investigate the factors affecting the trajectory of a projectile by launching objects at different angles and velocities.

9. Acid Rain Simulation: Create a simulated rainwater sample and investigate the effects of acid rain on different materials or organisms.

10. Diffusion and Osmosis: Study the movement of molecules across selectively permeable membranes using various solute concentrations.

11. Magnetic Levitation: Construct a simple magnetic levitation device to demonstrate the principles of magnetism and levitation.

12. Rusting Rates: Investigate the factors (such as temperature, humidity, and presence of inhibitors) that affect the rate of rust formation.

13. Respiration in Yeast: Observe the process of cellular respiration in yeast by measuring the production of carbon dioxide.

14. Newton’s Cradle: Explore the conservation of momentum and energy using Newton’s cradle, a classic physics demonstration.

15. Plant Phototropism: Investigate how plants respond to light stimuli and demonstrate phototropism using different light sources.

These 15 science experiments cover a wide range of scientific disciplines and concepts, ensuring that there is something for every high school student. Whether you’re interested in chemistry, physics, biology, or environmental science, these experiments will captivate your audience and foster curiosity about the world around us. So roll up your sleeves, gather your materials, and get ready to amaze your fellow students and teachers with these impressive science experiments. Good luck!

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20 Fun and Interesting Biology Experiments for High School 

Jennifer is a prolific writer with over 10 years of experience in online writing. She enjoys creating quotes and poems.

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Unlike science in middle school, high school biology is a hands-on endeavor. Experiments are a standard part of biology courses, whether they are part of a controlled laboratory class, science fair, or individual student projects. Explore a few fascinating high school biology experiments; and discover ideas for simple and easy biology experiments to incorporate into your curriculum.

Examples of Biology Experiments for High School

Whether you are looking for a science fair project or need to create a project for a class assignment, there are numerous biology projects for teens.

• Planting Spring Bulbs: An Easy-to-Follow Guide for Beginners
• 7 Senior Bio Examples to Help You Craft Your Own

Frog Dissection

Dissecting a frog is a quintessential part of high school biology. If possible, try to get both female and male specimens for your class so students can see the eggs and compare the insides to the male frog.

Flower Dissection

High schoolers can get a bit squirmy about frog dissection. Have a flower dissection instead. The teens can find and label the female and male parts of the flower. It can be fun for high schoolers to check out flower intricacies under a microscope.

Diversity Among Plant Samples

Another simple biology experiment involves going into your natural environment, such as a local park, to observe diversity among plant samples. To make the experiment more detailed, students can rub collected samples on filter paper to observe which plants present which colors . Teens can work to find out why certain plants present certain colors.

Phototropism

It can be enlightening to show kids how phototropism affects plants. They can set up an experiment by using different materials to affect light. They can see how affecting the light affects the growth of the plant.

Water From Common Sources

Water is everywhere. Unfortunately, water contains numerous elements too. A great experiment is collecting water samples from various sources and viewing them under a microscope. Students can then compare their results and attempt to postulate why a given water source would present more organisms than another would.

Yeast Experiment

Another experiment involves taking a piece of bread to monitor the molds that grow over a period of two weeks.

Taste Perception

Everyone has their own taste. Literally! Some people like sour things while others like sweet. Find out if everyone perceives taste the same way and has the same threshold for taste by doing an in-class experiment.

Disinfectant Effectiveness

Ever wonder how effective hand sanitizer is at killing bacteria? Test it! Grow bacteria in a Petri dish along with paper soaked in peroxide, white vinegar, rubbing alcohol, etc. Find out how each one of them works to inhibit bacteria growth.

Pea Plant Genetics

Students can recreate Mendel's genetic pea plant experiments . By growing pea plants and comparing their phenotypes, students can determine each parent plant's genotype.

Examining Fingerprints

Fingerprints are pretty amazing features on the human body. Not only can you use them to open your phone, but each one is unique . Put your fingerprint on paper and examine the different aspects of the lines and arches on your fingers. Compare fingerprints among everyone in class.

Comparing Animal and Plant Cells

To better understand animal and plant cells, students can compare cells from their cheeks to cells from an onion. Just stain the cells with iodine or another dye to better see the cell structures under a microscope.

Creating a DNA model is a great way to help students understand the structure and function of DNA in genetics. Students can use candy, string, and toothpicks to develop a fairly realistic model of the double helix structure.

Water Bottle Germs

Many people refill their water bottles in high school. But do they add germs or bacteria to the bottle? Is refilling a disposable water bottle safe? Have students take swabs of the water bottles they use and look for bacteria around the lid or on the bottle.

Testing Hair

Teens use a lot of hair products. But do they truly work? Have teens in your class take a few samples of their hair. See what happens to the hair when common hair products are added.

Water Cycle

Understanding the water cycle isn't hard. But teens can look at it firsthand by creating a water cycle experiment. Just have them fill a baggie with water and tape it to a window. They will watch evaporation, condensation, and precipitation in action.

Closed Ecosystem Bottle

It can be hard for students to imagine something having its own ecosystem. However, you can use a plastic bottle to create a closed ecosystem.

Field Survey Biology Experiment

This experiment is great because it is cheap, easy, and you can do it in a variety of areas around your school or send students home with it. The goal is to observe the surrounding area over time and monitor the samples that you collect.

Materials You'll Need

For this experiment, you need to grab:

• Jar or baggies to collect samples
• Stakes and string or cones help mark an area
• Paper or journals for taking notes
• Slides, slide covers, and a microscope

Observation Instructions

Take note that you will observe your area for several months, so choose an area that is easy to re-mark or where you can leave the markings up, so you return to the same designated area each time.

• Have students choose one spot to observe. The spot should be no more than two to three feet square.
• Do you see evidence of animals? (Look for prints, scat or guano, fur, owl pellets, etc.)
• What plant life do you see? (Look for moss, lichen, weeds, and other plants).
• What fungus do you see? (Look for mushrooms and other fungal growth).
• What insects do you see? (Encourage students to look specifically for relationships here - such as connecting mosquitos with water or bees with flowers or a hive).

Sampling and Classroom Instructions

Bring the research back into the classroom by following these instructions.

• Guide students to make connections and note relationships in their marked area. Have them inventory the area and draw a crude map of where everything is.
• If possible, have students use tweezers and gently take samples of soil, fungus, moss, plant life, insects, etc.
• pH value of soil or water
• Microorganisms in water
• Plant cells under a microscope
• Comparative structure of flowers you find
• Require students to record everything in their own journal or interactive notebook.

Teacher tip: Set up stations in the classroom for viewing, dissecting, drawing, testing pH, etc. This will allow students some choice in how they proceed with examining their specimens.

Testing for Bacteria

Have students see where the most bacteria are lurking. This experiment is great if you want a lab that has guaranteed results. There is always some kind of bacteria lurking somewhere, just waiting to grow in a student's Petri dish.

These are the materials you are going to need to have on hand.

• Prepared Petri dishes, three per student
• Sterile swabs
• Painter's tape
• Scotch tape
• Permanent Marker
• Graph paper

Material notes : You can also purchase sterile Petri dishes and agar separately; however, it is much more likely students will contaminate the plate before they swab.

Preparing Your Petri Dishes

Prepping your Petri dishes is an essential part of the experiment.

• Before opening any materials, have students identify three places (but in one physical location such as at home or at school) that they are going to swab for bacteria. Encourage them to hypothesize about which place they think will grow the most bacteria.
• Using the Petri dish, trace three circles on the graph paper and cut it out.
• In pencil, draw a line to denote the 'top' of the circle. It doesn't matter where you draw the line, but you will need something to show you how your Petri dish is oriented so you can be sure you're tracking the same colony each time you observe.
• On the back of the graph paper circle, note the location where you will take the swab, as well as the date you are taking the swabs. Do this for all three Petri dishes you have.

Collecting Samples

Have students bring their unopened sterile swabs and closed Petri dishes to the site. Carefully, they should:

• Set the Petri dish down on a flat surface.
• Unwrap the swab.
• Swipe the swab across the area they suspect has bacteria.
• Lift the lid, gently wipe the used swab across the agar, and close the lid, carefully but quickly.

Hint: Sometimes, it's helpful to tape the Petri dish shut so that the Petri dish doesn't accidentally lose its lid.

Evaluating Results

Now that you've swabbed the areas, it's all about the results.

• Have students draw Petri-dish-sized circles in their lab books or on separate graph paper. Draw one week's worth of Petri dishes for each dish the student has.
• As the colonies start to grow, have students draw the size in their notebooks, making daily observations. If they cannot observe daily, have them observe on the same day(s) over a month.
• They should also be recording the color and other notable features of their bacteria colonies in their lab books.
• At the end, the students should write a conclusion of their study.

The Effect of Light on Growth

In this lab, students investigate how light affects plant growth. Students may use any plants, but cress will grow more quickly, so your students can get results faster.

Gather up your materials.

• Styrofoam cup or bowl
• Potting soil

Instructions

With your materials at the ready, it's time to start your experiment.

• On Day 1 - plant seeds in the soil in the cups.
• Label the cups according to the light you're going to use. You can compare sunlight vs. complete darkness, or you can compare several types of light.
• On each day after the initial day, take a picture of each cup and try to measure the growth, if any.
• For your lab entries, measure the sprouts, and note color and shape characteristics.

Planaria Regeneration

In this lab, students watch the rate at which planaria regenerates and test whether how you cut the planaria makes a difference as to how they grow back.

To conduct this experiment, you want to grab.

• 9 planarias
• 3 small plastic Petri dishes
• 1 large plastic Petri dish
• 1 plastic pipet
• 1 magnifying glass
• 1 plastic coverslip
• Spring water
• Paper towels
• Ice pack(optional)

Setup Instructions

Getting the setup right is half the battle when it comes to creating fun and interesting biology experiments for high schoolers.

• Start by numbering the three small Petri dishes to ensure nothing gets confused later.
• Using the pipet, move a planarian into the large Petri dish.
• At this point, you may want to try to set the Petri dish on an ice pack for a few minutes. This isn't totally necessary, but it will slow the planarian down to make it easier to cut.
• Right behind the head
• Right in the middle
• Right towards the tail
• Use the pipet to gently transfer each segment to a new Petri dish (with spring water).
• Repeat the steps with all remaining worm segments.
• Every day, observe the planaria. Regeneration will be considered 'complete' when the photoreceptors (the black dots that look like eyes on the planarian's head) appear.

Scientific Method and High School Biology Experiments

Much of high school biology is focused on instilling the elements of science in students. The scientific method is one of these main focuses. The method prompts participants in science to be investigators and to come up with a guess about what will happen in a given experiment, called a hypothesis. The point of the experiment is then to either prove the hypothesis correct through the experiment or prove it incorrect. This prompts teens to get involved in the scientific method while teaching other scientific skills, such as:

• The ability to make a rational estimate based on present factors and knowledge
• Close detail and monitoring skills
• The possibility of being wrong and how to move past that if it turns out to be the case
• Quick thinking skills

As much fun as biology experiments can be, there is an educational component spearheading the experiment.

Fun and Interesting High School Biology Experiments

For teens, high school biology can be fun. Finding the right experiment can help biology pop off the page and become more than just another required course of study. Who knows? Perhaps your student will even be prompted to enter a science fair or a career rooted in science?

30 Best Science Experiments & Projects for High School

Welcome to our round-up of top science fair projects and science experiments tailored specifically for curious high school students.

Science fair is not just about the glitz and glamour of a first-place trophy; it’s about the passion, the inquiry, and the insatiable curiosity that drive every scientist, young and old. Hopefully, our curated list of the best hands-on science fair projects for high school students will ignite that curiosity in you.

Each project on this list offers a unique opportunity to dive deep into scientific inquiry and present findings with both clarity and flair.

Let’s dive in and make learning an unforgettable adventure!

1. Burn Calories

Don’t miss this opportunity to unravel the mysteries of energy transformation and uncover the scientific secrets hidden in the simplest of substances!

Learn more: Science Buddies

2. Extracting DNA from Strawberry

By following a series of simple yet insightful steps, students will witness the magical moment of DNA extraction, fostering a deeper appreciation for the fundamental building blocks of life.

Learn more: Extracting DNA from Strawberry

3. Build a Simple DIY Newton’s Cradle

As students assemble the materials and witness the rhythmic dance of swinging spheres, they will witness the scientific principles they’ve learned in the classroom come to life before their eyes.

4. Make a Monster Dry Ice Bubbles

Unleash your inner mad scientist and dive into a world of enchanting and eerie fun with this high school science experiment: Make Monster Dry Ice Bubbles!

Get ready to be captivated as you create giant, spooky bubbles that dance and swirl with the mysterious power of dry ice.

Learn more: Wonder How To

5. Soil Erosion Experiment

As stewards of our environment, it’s crucial to comprehend the impact of natural processes like soil erosion.

Through this experiment, students will gain a deeper appreciation for the significance of soil conservation and sustainable land management practices.

Learn more: Life is a Garden

6. Candle Carousel

This experiment combines the wonders of physics with the art of crafting, making it an enriching experience that ignites curiosity and fosters a deeper appreciation for the elegant dance of energy in our world.

7. Find Out if Water Conducts Electricity

In this captivating activity, students will explore the conductive properties of water and unlock the secrets of how electrical currents flow through different substances.

Learn more: Rookie Parenting

8. Roller Coaster Stem Experiment

By experimenting with various designs and track configurations, students will refine their problem-solving skills and gain valuable insights into the practical applications of physics and engineering.

Learn more: STEM Project

9.柠檬Battery

Engaging in this experiment not only teaches the basics of electrical circuits but also sparks curiosity about the natural world and the science behind it.

Learn more: Coffee Cups and Crayons

10. Watering Plants Using Different Liquids

我发现植物水合的奇迹ntriguing high school science experiment – “Watering Plants Using Different Liquids.” In this captivating project, students explore how various liquids impact plant growth and health.

Learn more: Lemon Lime Adventures

11. Measure Electrolytes Found in Sports Drinks

By conducting a series of tests and analyses, students will quantify the electrolyte content present in various sports drinks.

12. Relight the Flame Without Directly Touching It

这个迷人的项目challenges students to delve into the intriguing properties of heat transfer and combustion.

By exploring different methods to reignite a candle flame without physical contact, students will uncover the secrets of heat conduction, convection, and radiation.

Learn more: Stevespangler

13. Conduct Fingerprint Analysis

This captivating project immerses students in the intriguing world of crime scene investigations, where they will uncover the uniqueness of fingerprints and their role in forensic science.

14. Separate Water Into Hydrogen And Oxygen Using Electrolysis

This electrifying project allows students to explore the fascinating world of electrolysis and the decomposition of water into its elemental components.

Learn more: Navigating by Joy

15. Simple Color Detection Circuit

This experiment not only introduces fundamental concepts in electronics and circuitry but also opens up endless possibilities for real-life applications, from automated sorting systems to color-sensitive devices.

16. Carbon Sugar Snake

This enchanting project allows students to witness a dazzling display of science as they combine common household ingredients to create a dark, coiling “snake” made of carbon.

Learn more: Kiwi Co

17. Build a Hydraulic Elevator

This captivating project invites students to delve into the world of engineering and fluid mechanics. By constructing a working model of a hydraulic elevator, students will explore the principles of Pascal’s law and the fascinating concept of fluid pressure.

Learn more: Teach Beside Me

18. Brew up Some Root Beer

This enticing project invites students to explore the fascinating world of chemistry and fermentation while creating their own delicious and bubbly concoction.

Learn more: Home School Creations

19. Extracting Bismuth From Pepto-Bismol Tablets

This hands-on experiment not only sheds light on the principles of chemistry and lab techniques but also highlights the real-world applications of bismuth in medicine and various industries.

Learn more: Popscie

20. Solar-Powered Water Desalination

By designing and building a solar-powered water desalination system, students will learn how to harness the sun’s energy to purify saltwater and make it safe for consumption.

21. Applying Hooke’s Law: Make Your Own Spring Scale

By designing and constructing their very own spring scale, students will uncover the principles of Hooke’s Law and the relationship between force and displacement in a spring system.

22. Homemade Hand Warmer

By creating their own hand warmers using safe and easily accessible materials, students will witness the magic of heat generation through chemical processes.

Learn more: Steve Spangler

23. Explore the Concept of Symbiosis Involving Nitrogen-Fixing Bacteria.

By investigating how certain plants form a mutually beneficial bond with these bacteria, students will gain insights into the essential role of nitrogen fixation in the ecosystem.

Learn more: Education.com

24. Center of Gravity Experiment

This fascinating project invites students to explore the concept of the center of gravity and its role in determining stability.

25. Power up Homemade Batteries

This captivating project invites students to delve into the fascinating world of electrochemistry and energy generation.

Learn more: 123 Homeschool

26. Film Canister Explosions

Prepare for a blast of excitement and chemistry with the high school science experiment – “Film Canister Explosions!” This thrilling project invites students to explore the fascinating world of chemical reactions and pressure build-up.

27. Investigating Osmosis with Potato Slices

This hands-on experiment not only provides a practical understanding of osmosis but also highlights its relevance in everyday life, from understanding plant hydration to food preservation techniques.

28. Make Homemade Fly Trap

Delve into the fascinating world of insects with the high school science experiment – “Make Homemade Fly Trap!” This captivating project invites students to explore the principles of pest control and observe the behavior of flies.

29. Hydroponics: Gardening Without Soil

This exciting project invites students to explore innovative agricultural practices that harness water and nutrient solutions to grow plants.

By setting up their hydroponic system and nurturing plants through this method, students will witness the fascinating dynamics of root development and nutrient absorption.

30. Clothespin Airplane

As they test and modify their creations, students will delve into the principles of lift, thrust, and drag, gaining a deeper understanding of how these forces come together to keep airplanes soaring through the skies.

Learn more: Steamsational

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High School Science Fair Projects

By high school, students should be familiar with scientific methods and processes and have a grasp of basic science principles. Your high school science teacher will assign science fair projects with the goal of helping you develop the ability to apply knowledge of science processes to learn something new.

Doing a science fair project is like doing a real world job assignment. You will be using skills you have learned throughout your education to research a question or problem, develop possible solutions, design a test for your chosen solution and present your findings.

Project components

At the high school level, a science fair project typically must have the following components. However, you must carefully read the particular guidelines provided by your teacher or the science fair rules and follow them exactly.

Proposal : This is a very brief description of the experiment you plan to do. This short paragraph will help you get a very clear idea of what you are going to do. You may be required to turn this in to your teacher very early, before you do any other work. It allows the teacher to check that your planned experiment is safe, follows legal and ethical rules, and is not a simple demonstration.

Title : This is the name of your experiment. It is a good idea to use your science question as the title for your project.

Purpose : This is a statement describing what it is you want to find out by doing the experiment. It describes why you are interested in the topic that you chose and what you think you will learn. Students often include ideas about why the experiment is important and how the information you learn could benefit others.

Hypothesis : This is a prediction of what you think will happen in the experiment. This prediction must be based on some research, prior knowledge or observations. It should be stated in an “If/Then” format.

     “ If soil type affects erosion rates, then sandy soils will erode faster than clay soils.”

Materials list : All the equipment and resources needed to do the experiment.

Procedure : This is a step-by-step set of instructions for the experiment. It must be very detailed and include accurate measurements of materials needed for each step.

Results : This is where you document each phase of the experiment. It often includes experiment in different stages as well.

Research paper : This is usually a 2-3 page paper on a topic related to your experiment. You will include a history of similar experiments or inventions and their real-world applications. Define any specialized terms used in the experiment and show any mathematical formulas that you had to use.

Bibliography and References

Science fair project ideas

Stumped for ideas? First, review our guide on how to choose a science fair project . If you still need some help, here are some ideas for good science fair projects at the high school level.

Idea No. 1: How do changes in acidity affect the survival rates of an invertebrate population?

*Remember that it is against the rules in most science fairs to use vertebrate animals as subjects. Brine shrimp are not expensive and can be used as subjects for a variety of projects.*

1. In your background research, determine the average pH of the surface or groundwater in different areas of the country. Discuss how and why acid rain forms and how people monitor environmental pH. Find out what is being done to reduce acid rain and what might be the consequences of failing to control the problem.

2. Hatch some brine shrimp eggs (obtained from a science supply website or catalog) in a glass container. Shrimp should be hatched in a saltwater solution (1 teaspoon non-iodized or sea salt per cup of distilled water). Use baking soda and a pH meter or litmus paper to adjust the pH of the hatchery to about 7.5.

3. Hypothesize about the effects of an increasingly acid environment on the animals.

4. Divide the shrimp into several groups in different containers, being sure to leave a control group in the original hatchery and keeping it at a pH of 7.5.

5. Over a period of days, increase the pH of the test aquariums slowly by adding a few drops of white vinegar to the water each day. Adjust the pH slowly (abrupt changes will kill the shrimp) for each test group until the water pH is equal to the pH levels of water in different parts of the country.

6. Feed brine shrimp a few grains of yeast every other day, making sure to feed each group an equal amount.

Other possible brine shrimp projects could test the effects of caffeine or other pollutants. You could also try an experiment to test the effects of crowding the population.

Idea No. 2: What materials can be used to make successful pigments?

*Note that your dependent variable is the success of the pigments, how will you determine which were most successful?*

1. Research the ways in which ancient tribes or medieval artists created the paints they used for their masterpieces. Some of these were very dangerous and toxic such as using arsenic or mercuric sulfide, but many are safe and interesting to recreate as a science project that can also teach you some history.

2. Try polishing a small piece of copper with steel wool and brushing with vinegar. Let it dry and scrape off the green verdigris. Save the flakes in an envelope.

3. Scrape the soot that accumulates on a glass candle holder when the candle is burned.

4. Brew some very strong tea; add a few iron nails or iron filings, and a teaspoon of vinegar. Steep the mixture overnight and then remove the iron. Keep the mixture in a small glass jar with a lid.

5. Mix your pigments with raw egg to reconstitute them. This tempera will help the colors adhere to the paper. Research other fixatives used by artists throughout history.

6. Use smooth vellum paper (available at stationery or scrapbook stores) to simulate the paper used by medieval monks or use artist’s canvas for your testing surface.  If you are more interested in cave paintings use smooth tiles to simulate cave walls.

7. Hypothesize about other ways to obtain pigments and conduct experiments with other fixatives. Are there other plant materials that can be brewed like the tea to make other colors? Are there local minerals you could grind?

Remember to wear gloves and never taste any of your solutions. Use pots that you will not use to cook anything else if you experiment with local plants. It is a good idea to boil unknown plants outdoors as well.

Researching other historic processes like soap making, fabric dyes, papermaking or perfumes can also result in interesting projects.

Idea No. 3: What can be done to increase the amount of oil that can be moved through a pump?

1. Use a clear spray bottle to simulate a crude oil pumping station. Half-fill the bottle with pea-sized gravel and add 100 milliliters of vegetable oil. Replace the spray top, making sure that long bottom tube of the spray apparatus is as far down in the bottle as possible.

2. Attach one end of a piece of aquarium tubing to the outside of the spray head and put the other end in a graduated cylinder. Pump the spray handle to increase the pressure within the bottle. Determine how much oil you can pump out.

3. Hypothesize about different ways to increase the amount of oil you can pump from the bottle. How can you change conditions of viscosity, temperature or solution to increase the oil yield? In doing your research, look for ways in which oil companies obtain oil from underground reservoirs or shale formations.

Solve a problem

Science is problem solving, and there are problems to solve in every area of human interest. Start your science project by thinking about the problems in some area that interests you! You will be much more likely to complete a successful project if you choose a topic and a problem that you find interesting.

Here are some places to start:

• WonderHowTo.com: Science Experiments
• ScienceBuddies.org
• Vecchione, Glen, "100 Award Winning Science Fair Projects" (Sterling Publishing Co., Inc. New York, N.Y.)
• Gurstelle, William, "Backyard Ballistics" (Chicago Review Press, Inc., Chicago, Ill.)
• Cool Science Experiments for Hot Summer Days
• Science Experiments for Kids
• Make Your Own Spectroscope | Spectroscopy Science Fair Project

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Top 30 Biology Experiments for High-School

The field of biology offers a wide range of fascinating experiments that can deepen our understanding of the living world around us. From studying the behavior of cells to investigating the intricacies of ecosystems, biologists use a variety of methods to uncover the secrets of life.

We’ve compiled a captivating list of 30 biology experiments that are both educational and fun and also suitable for a wide range of ages.

These hands-on educational activities will not only deepen your appreciation for the intricacies of life but also fuel your curiosity and passion for scientific exploration.

So, roll up your sleeves, gather your lab equipment, and prepare to embark on an exciting adventure through the fascinating world of biology-based science experiments!

1. Grow a Butterfly

Students can gain knowledge about the various phases of development, from the egg to the larva to the pupa to the adult butterfly, by studying and taking care of a butterfly during its whole life cycle. This offers students a special chance to learn about the insect life cycle and the metamorphosis process.

Learn more: Elemental Science

2. Dissecting a Flower

Dissecting a flower can aid students in honing their analytical and observational skills. This may also aid in their comprehension of how a flower’s various components interact to facilitate reproduction, which is the flower’s main objective.

Learn More: How to Dissect a Flower

3. Extracting a DNA

The extraction of DNA is an excellent experiment for high school students to gain a better understanding of the principles of molecular biology and genetics. This experiment  helps students to understand the importance of DNA in research and its applications in various fields, such as medicine, biotechnology, and forensics.

Learn more: Extracting DNA

4. Looking at Fingerprints

Exploring fingerprints can be a fun and intriguing experiment. This experiment encourages students to develop their problem-solving skills and attention to detail, as they must carefully analyze and compare the various fingerprint patterns.

Fingerprint analysis is a fascinating and engaging experiment that can spark an interest in forensic science and provide students with a hands-on learning experience.

Learn more: Directions to Examine a Fingerprint

5. Cultivate Bacteria on Home Made Agar

This experiment provides a hands-on learning experience for students to understand the principles of microbiology and the techniques used in bacterial culture.

This experiment can also help students to understand the importance of bacteria in our daily lives, their role in human health, and their applications in various fields, such as biotechnology and environmental science.  

Learn more: Grow bacteria on Homemade Agar Plates

6. Make a Bioluminescent Lamp

This experiment provides an excellent opportunity for high school students to learn about bioluminescence and the principles of genetic engineering.

Creating a bioluminescent lamp is a fun and engaging way to explore the intersection of biology, chemistry, and physics, making it a perfect experiment for students interested in science and technology.

Learn more: Make Glowing Water

7. Make Plants Move with Light

This experiment can help students understand the role of light in plant growth and photosynthesis and the importance of light as an environmental factor for plant survival. 

Learn more: Experiments with Phototropism

8. Test the Five-Second Rule

The “5-second rule” experiment is a simple and fun way to investigate the validity of the popular belief that it is safe to eat food that has been dropped on the ground for less than 5 seconds.

The experiment is an engaging and informative way to explore the science behind a common belief and promote critical thinking and scientific inquiry among students.

Learn more: Five Second Rule

9. Examine How Antibiotics Affect Bacteria

This experiment is an excellent opportunity for high school students to develop their laboratory skills, such as aseptic technique and bacterial culture, and understand the principles of antibiotic resistance and its implications for human health.

Examining how antibiotics affect bacteria is a fascinating and educational experiment that promotes scientific inquiry and critical thinking among students.

Learn more: Learn About Bacteria

10. Look for Cell Mitosis in an Onion

This experiment is an excellent opportunity for high school students to develop their microscopy skills and understand the biological basis of growth and development in plants. This experiment is a fun and informative way to explore the world of cells and their role in the growth and development of living organisms.

Learn more: Onion Root Mitosis

11. Test the Effects of Disinfectants

Testing the effects of disinfectants is an important process in determining their efficacy in killing or reducing the number of microorganisms on a surface or object. Disinfectants can be hazardous if not used correctly, and testing their effects can help students understand how to use them safely.

Students can learn about proper handling techniques and how to interpret safety labels and warning signs.

Learn more: Antiseptic and Disinfectants

12. Microwave Seed Gardening

Microwave seed gardening is a quick and efficient method of germinating seeds, microwave seed gardening can be a useful method for starting seeds, but it should be used with care and in conjunction with other germination methods to ensure the best possible results. 

Learn more: Microwave plant

13. Water Bottle Bacteria Swab

This experiment can be a fun and informative way to learn about the importance of keeping water bottles clean and free from harmful bacteria. It can also be used to compare the cleanliness of different types of water bottles, such as metal, plastic, or glass.

Learn more: Swabbing Water Bottles

14. Frog Dissection

Frog dissection can be a valuable tool for teaching anatomy and physiology to high school students, as it provides a comprehensive examination of the internal organs and systems of the frog.

Dissection can be a valuable and engaging experiment for high school students interested in biology and life science.

Learn more: Frog Dissection

15. Witness the Carbon Cycle in Action

By witnessing the carbon cycle in action, learners can gain a better understanding of the interconnectedness of different parts of the Earth’s system and the impact that human activities can have on these processes.

Learn more: Carbon Cycle Lab

16. Investigate the Efficacy of Types of Fertilizer

Investigating the efficacy of different types of fertilizer can be an interesting and informative way to learn about plant growth and nutrition. Investigating the efficacy of different types of fertilizer is a practical and engaging way to learn about plant nutrition and the role of fertilizers in agriculture.

Learn more: Best Fertilizer

17. Explore the Impact of Genetic Modification on Seeds

Exploring the impact of genetic modification on seeds is a fascinating and relevant topic that can spark meaningful discussions and encourage learners to think critically about the role of science and technology in society.

Learn more: Genetically Modified (GM) Crops

18. Yeast Experiment

Another easy to perform experiment for high school students is the yeast. This experiment is simple since all that is required is the removal of four different food samples onto separate plates and a thorough examination of the mold that develops on each sample over time.

Learn more: Grow Yeast Experiment

19. Taste Perception 

The human tongue has specialized taste receptors that respond to five primary tastes: sweet, salty, sour, bitter, and umami (savory). Taste perception plays an important role in determining food preferences and dietary habits, as well as influencing the overall eating experience.

Learn more: Taste perception

20. Pea Plant Genetics

A classic pea plant genetics experiment involves cross breeding pea plants with different traits, such as flower color, seed shape, or pod shape.

This experiment can be conducted in a controlled environment, such as a greenhouse, by manually transferring pollen from one plant to another.

Learn more: Gregor Mendel Pea Experiment

21. Comparing Animal and Plant Cells

Comparing animal and plant cells is an important exercise in biology education. Both animal and plant cells are eukaryotic cells, meaning they contain a nucleus and other membrane-bound organelles.

This exercise can help students understand the structure and function of cells, as well as appreciate the diversity of life on Earth.

Learn more: Comparing Plant Cell and Animal Cell

22.  Testing Bacteria 

Bacteria are easily accessible and can be grown in a laboratory or even at home with simple equipment and materials. This makes it a practical and cost-effective experiment for schools with limited resources.

Learn more: How to grow Bacteria and more

23. The Effect of Light on Growth

Light is a fundamental environmental factor that plays a crucial role in the growth and development of plants. By conducting this experiment, students can gain a deeper understanding of how light affects plant growth and why it is important.

Learn more: The effect of light in Plant Growth

24. Planaria Regeneration

Planaria regeneration allows students to design their own experiments, as they can choose which body parts to remove and study the effects of different variables, such as temperature, pH, or chemical treatments on the regeneration process.

Planaria are easy to obtain and maintain in a laboratory or classroom setting. They are also affordable, making it an ideal experiment for schools with limited resources.

Learn more: Planaria Experiment

25. Making a Seed Board

Making a seed board can be a fun and engaging activity for students, as they can see the progress of their plants over time and share their results with others. It can also foster a sense of responsibility and ownership in caring for their plants.

26. Design an Owl Pellet

Dissecting an owl pellet provides a hands-on learning experience for students, allowing them to practice skills in scientific observation, data collection, and analysis. Students can also learn about the anatomy of the prey species found in the owl pellet.

27. Grow an Herbal Cutting

Growing an herb cutting provides a hands-on learning experience for students, allowing them to practice skills in plant care, experimental design, and data collection. Students can learn about the different stages of plant growth and the factors that affect it.

28. Eat a Cell Model

Creating an edible cell model connects to various disciplines, such as biology, anatomy, and nutrition. Students can learn about the different organelles that make up a cell and their functions, as well as the nutritional value of the food materials used in the model

29. Make a Habitat Diorama

Making a habitat diorama provides a hands-on learning experience for students, allowing them to practice skills in research, creative design, and presentation. Students can learn about different ecosystems and the organisms that inhabit them.

30. Create a Fall Leaf (or Signs of Spring) Journal

Creating a fall leaf (or signs of spring) journal provides a hands-on learning experience for students, allowing them to practice skills in observation, data collection, and analysis. Students can learn about the changes that occur in nature during the fall or spring season.

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10 Awesome Chemistry Experiments for High School Students

The subject of chemistry is one subject that sends shivers down the spines of students, and sometimes even parents(maybe when they remember their own high school days). Yet chemistry is everywhere, right from the food we eat to the pharmaceuticals we use and the cosmetics we are so fond of.

Therefore, performing certain fun-filled experiments with our high schoolers is a sure-shot way to get the fear of chemistry out of their minds. Where fear stops, curiosity is aroused. Hence, let the learning begin.

Fun-filled chemistry experiments for high school students

1. mystical cloud.

To create the mystical cloud, perform the following steps:

• In an opaque bottle, mix 30% hydrogen peroxide. 
• Lower a tea bag containing potassium iodide into the bottle. 
• The exothermic reaction between the hydrogen peroxide and potassium iodide will rapidly release oxygen gas, forming a large, mystical-looking cloud in the bottle.

Explanation:

This experiment demonstrates the chemical reaction that produces the cloud, as well as the concept of gas formation. The opaque bottle creates a dramatic visual effect, making the cloud appear “mystical.” 

This mystical cloud experiment is sure to catch the eye, as well as the young minds of our high schoolers and get them started on the chemistry journey!

2. Dancing spaghetti experiment

Here is how to do the dancing spaghetti chemistry experiment:

• Pour 1 cup of water into a tall clear glass and add 2 teaspoons of baking soda. Stir until the baking soda is fully dissolved.
• Break uncooked spaghetti noodles into 1-inch pieces and place about 6 pieces into the glass. The spaghetti will sink to the bottom.
• Add 5 teaspoons of vinegar to the glass. Observe as the spaghetti pieces start to rise up and “dance” around due to the chemical reaction between the baking soda and vinegar producing carbon dioxide gas bubbles.
• As the spaghetti dance slows down, add a bit more vinegar to keep the reaction going and the spaghetti dancing.

The spaghetti dances because the carbon dioxide bubbles attach to the rough surface of the noodles, decreasing their density so they float up. When the bubbles pop at the surface, the spaghetti sinks again until more bubbles form. This demonstrates the principles of buoyancy and chemical reactions.

This dancing spaghetti experiment will help the student understand the magic of chemistry in lifting the spirits of scientific inquiry.

3. Bouncy balls to explore polymer properties

Steps to make the bouncy balls:

• Mix 3 level spoonfuls of Elmer’s glue (which contains the polymer polyvinyl acetate), with 5 mL of water and 1 level spoonful of borax powder(which forms cross-links between the polymer chains). Allow to interact for 10-15 seconds before stirring.
• Once the mixture becomes difficult to stir, remove it from the container and knead it with your hands. The ball will start to be sticky and messy but will solidify as you knead it.
• Record observations about the ball’s appearance, stretchiness, and bounciness.
• Try varying the amounts of glue, water, and borax, or adding cornstarch to see how it affects the final bouncy ball properties.

This experiment allows students to explore how changing the polymer composition and cross-linking affects the physical properties of the resulting material. It’s a great hands-on way to learn about the versatile nature of polymers.

The bouncy balls are an exciting and fun-filled experiment to understand everyday applications of chemistry.

4. Colourful flames experiment

Here are some ways to create colorful flames by adding different chemicals :

• Sprinkle salts like sodium chloride (table salt), copper(II) chloride, strontium chloride, or barium nitrate into an alcohol flame to produce yellow, green, red, or blue colors. The heat excites the atoms in the salts, causing them to emit characteristic colored light as the electrons return to their ground state.
• Soak wood chips or sawdust in solutions of metal salts like copper sulfate (blue-green), strontium chloride (red), lithium chloride (pink), or boric acid (green). Allow to dry, then toss the treated chips onto a campfire to produce colored flames.
• Embed metal salts into paraffin wax to make “colored fire wax cakes”. Melt wax in a double boiler, mix in the desired salts, pour into cupcake liners, and let harden. Toss the wax cakes onto a fire for long-lasting colored flames.

Explanation :

The colors produced depend on the specific metal ions present. Sodium gives yellow, copper gives blue-green, strontium gives red, and barium gives green flames. The colors are produced because the metal ions in the salts emit light at specific wavelengths when heated in the flame. This is the same principle used to create colored fireworks

Creating colorful flames by adding different chemicals to a flame is a beautiful rainbow experiment to spark an igniting and everlasting flame of interest for chemistry.

5. Extracting anthocyanin pigment from red cabbage to create a natural pH indicator

To extract anthocyanin pigment from red cabbage and create a natural pH indicator, follow these steps:

• Chop red cabbage leaves into fine pieces to allow the water to extract the anthocyanins.
• Add the chopped cabbage to a pot and cover with distilled water. Bring the mixture to a boil, then simmer for 25 minutes, stirring occasionally
• Filter the solution through a coffee filter or strainer to remove the cabbage pieces, leaving just the anthocyanin-infused water
• (Optional) Boil off 20-50% of the solution to concentrate the anthocyanins for more vibrant colors.5
• Use the anthocyanin solution to test the pH of various household substances:
• Acids like lemon juice, vinegar, and grapefruit juice will turn the solution red.
• Neutral substances like water will keep the solution blue or purple
• Bases like baking soda and ammonia will turn the solution green or yellow.

The anthocyanin pigments change color due to a chemical reaction that occurs at different pH levels. This natural pH indicator provides a fun way to explore acids, bases, and neutrals.

This red cabbage experiment thus is an exciting experiment to familiarise the students with the entire spectrum of pH with its acids, bases, and neutrals!

6. Elephant toothpaste experiment

The key steps to form the elephant toothpaste foam are:

• Mix 1/2 cup of 3% hydrogen peroxide with a squirt of dish soap in a plastic bottle.
• Add a few drops of food coloring if desired.
• In a separate cup, mix 1 tablespoon of yeast with 3 tablespoons of warm water. Stir for 30 seconds.
• Quickly pour the yeast mixture into the bottle and watch the foamy reaction erupt.

The reaction occurs because the catalyst (yeast or potassium iodide) speeds up the decomposition of the hydrogen peroxide into water and oxygen gas. The dish soap traps the oxygen bubbles, creating a dramatic foaming effect. The reaction continues as long as there is hydrogen peroxide and a catalyst remaining.

Thus, this exothermic reaction creates the elephant toothpaste, as well as exponentially engages the curiosity of the students performing the experiment.

7. Chromatography with coffee filters

Chromatography with coffee filters is a simple science experiment that demonstrates the separation of colors in ink or dye. To do this experiment:

• Draw a circle with a washable marker on a coffee filter, leaving the center blank. Fold the filter into a triangle. 
• Suspend the folded filter in a cup of water, making sure only the tip touches the water. The water will travel up the filter, separating the colors in the marker. 
• After 15-30 minutes, the colors will separate and become visible on the filter. Common results show blue, green, and red/pink colors emerging from the original black marker. 

This experiment works because of capillary action and chromatography – the water carries the water-soluble dye molecules at different rates through the filter material. However, it is important to remember that Permanent markers do not work as well since their dyes are not water-soluble. 

The separation of colors provides a spectacular result that will surely capture the imagination of young minds!

8. Lava lamp experiment

Steps to create the spectacular lava lamp:

• Fill a clear plastic bottle about 1/4 full with water. Pour vegetable oil into the bottle until it is almost full, then wait a couple of minutes for the oil and water to separate.
• Add a few drops of food coloring, which will sink through the oil, and mix with the water
• Break an Alka-Seltzer tablet into pieces and drop them into the bottle. The tablet will sink to the bottom, start dissolving, and release carbon dioxide gas bubbles.
• The bubbles will attach to the colored water blobs, making them float to the top. When the bubbles pop, the colored water will sink back down.

The lava lamp works because oil is less dense than water, so it floats on top. The food coloring has the same density as water, so it sinks through the oil. The gas bubbles from the Alka-Seltzer are lighter than water, so they float up, bringing the colored water with them

Fun tip: To keep the lava lamp going, just drop in another piece of Alka-Seltzer tablet when the bubbling slows down. Your evergreen lava lamp may just spark a permanent love for all chemicals and chemistry!

9. Magic milk experiment

The magic milk experiment demonstrates how soap interacts with the fats and proteins in milk:

• The magic milk experiment involves pouring milk into a shallow dish and then adding food coloring. 
• It is followed by touching a cotton swab dipped in dish soap to the surface of the milk. This causes the food coloring to swirl and dance around, creating a colorful “fireworks” effect.

The reason this happens is that the soap molecules have a hydrophilic (water-loving) end and a hydrophobic (water-fearing) end. When the soap touches the milk, the hydrophobic ends attach to the fat molecules, causing them to move around rapidly. The food coloring gets swept up in this motion, resulting in a colorful display. 

Another way to get even more creative with the experiment is to try it with different types of milk to see how the fat content affects the results. The more fat in the milk, the more dramatic the color display will be, and faster your student will be fascinated with chemistry!

10. Ammonia fountain experiment

The ammonia fountain experiment demonstrates the high solubility of ammonia gas in water due to hydrogen bonding. Here’s how it works:

• A flask is filled with dry ammonia gas by heating a mixture of calcium hydroxide and ammonium chloride.
• Water is injected into the flask through a syringe, causing the ammonia gas to rapidly dissolve. This creates a partial vacuum inside the flask.
• The external atmospheric pressure forces water up a tube and out through a jet, creating a fountain effect. The ammonia solution is alkaline, so adding a pH indicator like phenolphthalein turns it pink.
• As more ammonia dissolves, the pressure inside the flask drops further, causing the fountain to continue for several minutes.

This experiment illustrates the concepts of solubility, gas laws, and acid-base chemistry at an introductory level. It can also be done with other highly soluble gases like hydrogen chloride.

The ammonia fountain experiment will surely skyrocket your high schooler’s interest in chemistry experiments and the various explanations of the world it opens to them.

Chemistry is often referred to as the “central science” because it connects various fields, including physics, biology, and environmental sciences. Thus, it is absolutely imperative that students not view it as a textbook roadblock on the way to graduation. Rather, it should be seen as an exciting hiking trip that will become more adventurous while passing each milestone. 

The same holds true for physics. And we can prove to you that physics can be fun too with these physics experiments for high school students!

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High School Science Experiment Ideas

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Try these ideas for science experiments targeted at the high school educational level. Perform a science experiment and explore different  hypotheses to test.

Caffeine Experiments

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You've probably heard that caffeine acts as a stimulant and may increase your concentration when you are under its influence. You can test this with an experiment.

Sample Hypothesis:

• Caffeine use does not affect typing speed .
• Caffeine does not affect concentration.

Student Conformity Experiments

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You are in a large group of students and the instructor asks the class what 9 x 7 is. One student says it is 54. So does the next. Do you fully trust your answer of 63? We are influenced by the beliefs of the people around us and sometimes conform to what the group believes. You can study the degree to which social pressure affects conformity.

• The number of students will not affect student conformity.
• Age does not affect student conformity.
• Gender has no effect on student conformity.

Smoke Bomb Experiments

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Smoke bombs are fun for kids of all ages but are probably not appropriate experiment subjects for kids younger than high school level. Smoke bombs offer an interesting way to learn about combustion. They can be used as propellants in rockets, too.

• The ratio of smoke bomb ingredients will not affect the quantity of smoke that is produced.
• The ratio of ingredients will not affect the range of a smoke bomb rocket.

Hand Sanitizer Experiments

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Hand sanitizer is supposed to keep germs under control on your hands. You can culture bacteria to see if hand sanitizer is effective. You can compare different types of hand sanitizer to see if one works better than another. Can you make an effective natural hand sanitizer? Is hand sanitizer biodegradable?

• There is no difference in the effectiveness of different hand sanitizers.
• Hand sanitizer is biodegradable.
• There is no difference in effectiveness between homemade hand sanitizer and commercial hand sanitizer.
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21 Unique Science Projects for High School Students

• Last modified 2024-07-05
• Published on 2023-10-31

Whether you’re leading a group science project or working independently to pursue your own scientific interests , we brainstormed to create the most unique list of science project ideas for high school students. Discover fresh, cool science project ideas that you’ve never seen before! In addition, we’ve added some bonus material to walk you through how to do research for your project, and write a report in a fun and engaging way that will all but guarantee that ticket ends up in your hands!

What should you include in your high school science project?

Science teachers hold students ages 14-18 to a much higher standard when grading science projects. High schoolers must demonstrate a solid understanding of the scientific method and reflect current guidelines in the Science, Technology, Engineering, and Mathematics (STEM) industry. Students’ science projects must also demonstrate their curiosity and eagerness to explore new and complicated scientific concepts.

Structure your science project neatly in sections, and make sure you include all necessary components: Purpose, Background Information, Scientific Question, Hypothesis, Materials, Procedures, Results, Conclusion, and Works Cited/Bibliography. When editing your science project, some questions to ask yourself are:

• Are my steps clear enough for someone to easily replicate my results?
• Do I have tables and graphs to illustrate the collected data? Are they easy to read?
• How original is my idea compared to other high school science projects?
• How can I present my science project in a clear way to ensure my audience understands the complicated scientific concepts?

Science Project Ideas for Each Subject

In high school, students typically take Biology, Chemistry, and Physics chronologically from 9th to 11th grade. 12th graders can choose which science subject they performed best in and take an AP science class in that subject for a challenge and to college credit. Depending on their school’s science class offerings, high school seniors can also take more focused science classes such as AP Environmental Science, AP Psychology, AP Human Geography, or AP Computer Science. Learn more about the differences between each subject .

With so many intriguing science project ideas for high school students, choosing a project that’s best for you can be difficult. When reading through this list, consider which ideas strike your interest. Do they relate to something your teacher mentioned in class? Is it a science project you’ve always been curious about? Would you want to study this topic as your college major? Will this science project be helpful in your portfolio when applying for your dream university?

When you find a science project idea that appeals to you, the best way to approach the topic is to do background research. Look up some keywords from the description in research journal databases, such as The Concord Review and Journal of High School Science. These 12 research journals are easier to read and more suitable for high schoolers because the papers are all written by other high school students.

Biology Science Projects

• Explore gene editing and its possibilities by creating genetically modified organisms or treating genetic disorders.
• Discover why people get seasonal allergies and which biological differences make some people more prone to allergic reactions than others.
• Research an invasive species that was recently introduced in your community, and predict its impact on native species.

If you’re curious to learn more about biology, consider taking an AP Biology class at your high school. Or, if you’re just getting started, check out an online class on the foundations of biology .

Chemistry Science Projects

• Test how effective Advil (ibuprofen) is compared to Tylenol (acetaminophen) when dealing with different symptoms and illnesses.
• Examine the chemical anatomy of different artificial food dyes or other additives, and compare their effects on our health.
• Develop a skincare product that’s safe to use.

Do these science project ideas sound interesting to you? Consider taking an online chemistry course to learn more about your scientific interests and get ahead of the game!

Physics Science Projects

• Explore the popular yet controversial topic of how one electron can be in two places at once.
• Determine the differences between the two atomic bombs the U.S. used in World War 2.
• Uncover the differences in safety features between a gas engine car and an electric car when rapidly decelerating from a high speed.

Environmental Science Projects

• Compare the water pollution levels in your town and a neighboring town to determine what factors might be causing higher pollution levels. Propose a social change initiative to lower water pollution.
• Conduct a study on your school’s recycling habits. How can the current system be made more efficient? How much recycling ends up as unusable waste in landfills?
• Investigate solutions to cleaning up oil spills. What is the most effective method?

In most cases, studying Environmental Science requires a solid understanding of Biology, since these subjects overlap. If you’re interested in both subjects, you might want to consider studying them in college. Before then, it’s essential to understand the differences between Environmental Science and Biology; so, choose the right AP course and earn college credit toward your future major.

Psychology Science Projects

• Compare and contrast the effectiveness of medicine versus hallucinogenic plants for different illnesses. Why might some people prefer alternative medicine over traditional medicine?
• Dive into how cultural or socio-economic factors may contribute to someone’s belief in conspiracy theories and political extremism on social media.
• Research the effects of college admissions on self-esteem and long-term life satisfaction.

Need more ideas? Check out some more psychology research topics to find the best science project for you.

Human Geography Science Projects

• Design a more sustainable urban development plan for your city. How could your city be remapped?
• Analyze the impact of farmers’ markets on people’s relationship to food and healthy eating habits.
• Uncover some key reasons behind the rapid spread of COVID-19 across the world.

As one of the more directly applicable sciences, human geography science projects delve into more practical topics. If these topics interest you, AP Human Geography might be a great class for you to take!

Computer Science Projects

• Design a therapy Chatbot to help users practice simple exercises for boosting mental health, such as gratitude journaling.
• Analyze the relationship between mental health disorders in younger generations and the rise of social media using data visualization tools.
• Code an interactive experience for an emotional support robot dog.

Thinking about taking your computer science skills to the next level? Try testing out your skills with AP Computer Science .

Presenting your Science Project in a High School Classroom

People tend to think that science projects are about writing science reports and long research papers. However, there are more engaging ways to showcase your scientific discoveries and have fun along the way!

Write a Blog High school students can exercise their creative muscles by starting a science blog. Students can research current events in science and write posts about recent scientific developments in the STEM industry. Not sure how to get started? Here are some tips on how to create a blog .

Make a Board Game Another fun idea to present a science project is to make a board game. As players progress across the board, they can learn about your research questions, hypothesis, variables, and what you discovered in your science experiment.

Add Kahoot to Your Slides If part of your assignment is to make PowerPoint slides, make your presentation slides more interactive and engaging by adding a game of Kahoot . Kahoot is a website that lets you make a fun quiz to share with your classmates. You can add the game to the end of your presentation to quiz them on what they learned from your science project. Prepare a small prize for whoever gets the most correct answers!

Make a Model for a Live Demonstration Consider whether or not your experiment can be replicated through a model in time, which is by far the best way to grab your audience’s attention. Even if your whole experiment can’t be built into a model, make part of it to help your classmates understand a difficult scientific concept.

How to Write a Scientific Research Paper

Even if you’re stuck just writing a paper for your science project, don’t worry. Start with looking into research that’s already been done on the topic. Here are resources on how to conduct scientific research and how to read complicated research papers . Once you move onto writing your science paper, talk with a tutor to get clear, personal feedback from experienced teachers.

Next Steps – Share your Science Projects

Want to take your science project to the next level? There are countless ways for high school students interested in science to get involved outside of class . The best way to get your innovative science project out into the world is through competitions and fairs. Check out these 11 STEM competitions for high school students that you can enter!

An impressive, creative, and well-documented science project can help with college admissions and with pursuing a career in medicine , or other scientific fields. Follow the steps outlined above to structure your science project in an organized, coherent fashion. When you’re ready, take your science project to STEM competitions and boost your chances of getting into your dream college!

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Curriculum Resources > High School Science Fair Projects  

High School Science Fair Projects

Below you’ll find a list of high school science fair projects. Choose a topic that interests you, then begin your preliminary research.

High school science fair projects require a high level of original thought and development. Consider these ideas as springboards to help develop your own original project. To participate in an upper-level competition, your project should be relevant to current science and technology. The project should also present a benefit to society.

High School Science Fair Project Resources

For tips on performing your experiment and presenting your project, see our free science fair guide.

To start brainstorming, explore our Science Fair category for more project ideas and helpful kits.

Ideas for High School Science Fair Projects

Life science.

• Compare the effect of antibiotics on gram-positive and gram-negative bacteria. (Grow your own cultures with agar & petri dishes . For a sample procedure and more project ideas, see our bacteria science project guide .)

• Run a bioassay to test for toxicity in water or soil .
• Test the effect of ultraviolet radiation on bacteria growth.
• Do different types of bread grow different types of mold? Does temperature or light affect mold growth?
• Experiment with plant genetics (plant hybrids, cross-breeding).
• Test factors like smoke or pollution that might affect transpiration rates for plants.
• Investigate the effects of increased oxygen or carbon dioxide concentration on plant germination.
• Find out the differences in properties and effects of organic vs. chemical fertilizers.
• Explore methods of erosion prevention, test effects of different soil composition on erosion (e.g. how does more clay compare to more sand?).
• Experiment with methods of flood management and containment.
• Investigate the effects of sunspots on weather patterns.
• Work with methods for forecasting weather .
• Test the concentration and effect of minerals and pH in soil and water samples. (Use water test strips and a soil analyzer .)
• Determine chemical makeup of rain in your area; test possible hazardous effects.

Physical Science

• Study acoustic models and methods of noise control. (A sound measurement kit/ might be helpful.)
• Experiment with the effect of storage temperatures on batteries.
• Develop improvements in battery chargers; try methods of using solar cells to recharge batteries.
• Compare the bending strength and durability of different building materials.
• Build a potato-powered battery .
• Experiment with building materials that are fire-preventative.
• Design industrial uses of magnets ; test the effects of magnetic and electromagnetic fields on living organisms such as brine shrimp .
• Design a project in advanced robotic programming .
• Build a sensor-moving advanced Bristlebot robot .
• Test the effects of the pH level of a solution on the corrosion of iron and copper ; explore different methods of corrosion prevention.
• Experiment with types, effectiveness, and the impact on the nutritional value of preservatives in food.

• Compare the properties and effects of artificial sweetener vs. sugar or other natural sweeteners. (For this and the following tests, you might consider the Chemistry of Food kit .)
• Test the chemical properties and physiological impact of saturated, unsaturated, and trans fats.
• Use indophenol to test the effect of different cooking methods on the depletion of vitamin C in food.
• Investigate the role of enzymes and yeast in the fermentation or cheese-making process.
• Experiment with different methods of water filtration/purification (such as solar distillation ).
• Analyze the by-products of gasoline; compare the efficiency of various octane levels.
• Conduct an orange juice titration demonstration

Environmental Science

• Compare or develop methods of hydrogen production and storage for use in fuel cells .
• Investigate methods of improving home insulation.
• Experiment with expanded uses of solar energy .
• Test methods for cleaning up and neutralizing the effect of oil in salt water with this oil spill cleanup kit .
• Work with methods of processing/recycling non-biodegradable items; experiment with decomposition aids.
• Experiment with design and function of wind turbines or water wheels .
• Test for harmful effects of pesticides; test or develop natural/organic alternatives; test the effectiveness of common pesticides such as DEET.
• Which type and color of roofing material provides the most energy efficiency?

For more in-depth high school science fair project ideas, we recommend the Science Buddies website.

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