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105 Science Fair Projects for High School

105 Science Fair Projects for High School

Looking for inspiring high school science fair project ideas? You're at the right place, as we compiled this wide range of science projects for 9th grade, 10th grade, 11th grade and 12th grade!

Jet Lag in Hamsters
Do hamsters suffer from jet lag? Find out if hamsters have a circadian rhythm!
Hard
Growing Pineapples
Can you make a pineapple grow faster in soil, sand, or water? Let's find out!
Medium
Osmosis in Eggs
Have you ever wondered what happens when you put an egg in salt water? Find out in this science project!
Hard
Create a Hand-Drawn Hologram
Make a hologram with nothing more than a compass and some scraps of plexiglas!
Hard
Are Dogs Color-Blind?
Can dogs tell the difference between blue and yellow? Find out in this science project!
Hard
The Effects of Salt and Sugar on Water
Have you ever wondered what happens when you add salt or sugar to water? Find out in this science project!
Hard
Plant Pavlovian Conditioning
Can plants learn? Find out if the Mimosa Pudica plant can be conditioned to respond to stimuli like animals do!
Hard
Galileo's Inclined Plane Experiment
Learn how to use Galileo's inclined plane experiment to demonstrate acceleration with a fun and easy science project!
Hard
Uncovering Chaos: Precision and Iterative Processes
How does precision affect chaos? Join us as we explore the varying effects of precision on iterative processes!
Hard
Detecting Infrared Light
Have you ever wondered what kind of light we can't see? In this experiment, you will explore the invisible light called infrared and measure its temperature.
Hard
Tooth Decay Experiment With Eggs
Can your favorite drinks harm your teeth? Find out using hard boiled eggs in this science project!
Medium
Cornstarch Quicksand: Can You Escape Its Grasp?
Mix cornstarch and water to make quicksand and see if your hands sink!
Medium
Porosity and Permeability of Rocks: Holding Water, Gas and Oil
Can some rocks hold more oil, gas and water than others? Find out in this rock porosity and permeability experiment!
Medium
Measuring Rock Density
Rocks are irregularly shaped. How can you measure the density of a rock? (Density = weight / volume) Discover the answer by using water displacement and weighing the rock to ...
Medium
Rock Hardness Challenge
How hard is that rock? You can learn how to classify your own rocks by their hardness just like geologists!
Medium
Make Plastic From Milk
Did you know that milk from the fridge can be transformed into plastic? How cool is that?
Easy
Decomposing Plastic Spoons
Let's find out how quickly biodegradable spoons can decompose in soil!
Hard
Color and Taste
Do you think the color of a beverage affects how it tastes?
Medium
Glowing in the Dark
Have you ever wondered how to make glow-in-the-dark stickers glow longer?
Medium
How Temperature Affects Taste
Do you like your food hot or cold? Find out how temperature affects your taste buds in this fun experiment!
Medium
Keeping it Chill
Let's find out if aluminum foil can keep a bottle of water cold for a longer period of time!
Hard
Music and Sleep: A Science Project
Does classical music help children fall asleep faster? Find out in this science project!
Hard
Investigating Insects on Trees
Join us on an adventure to explore the different kinds of insects living on three different species of trees!
Easy
Music and Blood Pressure
Does music affect your blood pressure? Find out in this fun experiment!
Hard
Bacteria and Toothpaste
Find out if brushing your teeth with toothpaste can reduce the amount of bacteria in your mouth!
Hard
Thermal Insulation of Glass Windows
Are you curious about how different types of glass windows can affect the temperature inside a room? Find out in this science project!
Hard
Bacteria in Water Coolers
Is the water from a water cooler really more bacteria-filled than tap water? Find out in this science project!
Hard
UV Protection and Clothing Color
Does the color of your clothing affect how much UV radiation you're exposed to? Find out in this science project!
Hard
Acid Rain and Building Materials
Does acid rain dissolve buildings? Find out by testing marble, limestone, granite, and bricks in vinegar!
Hard
Ceiling Height and Room Temperature
Does the height of your ceiling affect the temperature of your room? Find out in this science project!
Hard
Keeping Water Warm
In this science project, you will compare the thermal insulation of air, sand, and Styrofoam to see which one can keep water warm the longest.
Hard
Exploring Fractals
Discover how to create beautiful shapes and images using simple geometric shapes and mathematical formulae.
Hard
Electricity and Plant Growth
Can electricity help plants grow faster? Find out in this science project!
Hard
Tennis Racquet Grip and Fatigue
Does the way you hold your tennis racquet affect how tired your muscles get? Find out in this science project!
Hard
Running Barefoot: A Science Project
Do you want to know if running barefoot is better for your body than running with shoes? Find out in this science project!
Hard
Temperature and Tuning Forks
Does temperature affect the sound of a tuning fork? Find out in this science project!
Hard
Sunlight and Bacteria Growth
Does sunlight kill bacteria in water? Find out in this science project!
Hard
Bernoulli's Principle and Shapes
Discover how the Bernoulli's Principle works with different shapes and how it affects lift!
Hard
Music and Plant Growth
Does music make plants grow faster? Find out in this science project!
Hard
Seeing 3D in Magic Eye
Can you see a 3D image in a 2D pattern? Test your eyesight with this fun science project!
Hard
Light's Dual Nature
Discover how light can behave like both a wave and a particle in this fun experiment!
Hard
Bacteria in Poultry Meat
Is irradiated chicken really the safest to eat? Find out in this science project!
Hard
Testing Carbohydrate Levels in Milk
Are you curious about the different levels of carbohydrates in different types of milk? Find out by conducting this science fair project!
Hard
The Salty Science of Electrolysis
Have you ever wondered what happens when you mix salt and electricity? Find out in this science project!
Hard
Decomposing Dairy Waste
Discover how temperature affects the production of methane gas from dairy waste!
Hard
Video Games and Concentration
Do video games help kids concentrate better? Find out in this science project by testing 10 boys and 10 girls aged 15 years on their concentration after playing video games ...
Hard
Testing Antacids
Find out which antacid can neutralize the most acid and get relief from heartburn and gastritis!
Hard
Exploring Color and Water Depth
Dive into this science project to explore how the color of objects changes as they are submerged deeper into the water.
Hard
Temperature and Peroxidase Enzyme
Let's explore how temperature affects the peroxidase enzyme and how it helps convert toxic hydrogen peroxide into harmless oxygen and water.
Hard
Comparing Baseball Bats
Do aluminum bats hit the ball further than wooden bats? Find out in this science project!
Hard
Temperature and the Catalase Enzyme
Discover how temperature affects the enzyme Catalase and how it helps convert hydrogen peroxide into oxygen and water.
Hard
Can Dogs Hear?
Do you ever wonder how well dogs can hear? In this science project, we will find out how age and breed affect a dog's hearing ability.
Hard
Sound Transmission Through Different Materials
Can different materials affect how sound travels? Find out by testing the sound transmission of different materials in this science project!
Hard
Parachute Drop Velocity
How does the shape of a parachute affect its drop velocity? Find out in this science project!
Hard
Turmeric Antioxidant Experiment
Can turmeric juice counteract the effects of perchlorate on daphnia? Find out in this science project!
Hard
Spatial Reasoning and Strategy Games
Do you like solving puzzles and playing strategy games? Find out if it can help you with your spatial reasoning skills!
Hard
How Quickly Do We Respond to Colors?
Do you know how quickly you can respond to different colors? Find out in this science project!
Hard
Extracting DNA from Onions
Can DNA be taken out of the cell? We'll find out using an onion! (Check out the video where DNA is taken out of strawberries!)
Medium
Can Fish Tell Time?
Can fish recognize when it's time to eat? Find out by creating a feeding schedule and observing your fish's behavior!
Easy
Let's Glow!
Can bioluminescent bacteria measure water pollution? Join us to find out!
Medium
Investigating the Effects of Amylase on Starch
Let's explore how enzymes work by testing the effects of amylase on starch!
Hard
Bacteria in Water Bottles
Do you reuse your water bottle without washing it? Find out if bacteria increases in your water bottle!
Hard
Betta Fish Aggression
Can a betta fish learn to ignore a mirror? Find out in this science project!
Medium
Hatching Eggs in an Incubator
Learn how to construct an incubator and hatch eggs with this fun science project!
Hard
Build Your Own Electric Motor
Learn how to make your own electric motor with magnets, wire, and a battery!
Hard
The Monopoly Mystery
Can a computer's personality determine who wins the game of Monopoly? Find out in this experiment!
Hard
Glowing Bacteria
Have you ever seen bacteria that glow in the dark? In this project, you will streak luminescent bacteria on an agar plate and watch them grow and glow!
Hard
Insulating Boiling Water
Find out which materials are the best insulators and how they affect the temperature of boiling water!
Medium
Exploring the Tilt of the Earth
Learn why the seasons change and how the tilt of the Earth affects the intensity of the sunlight at a given location!
Medium
Solar Oven Hot Dog Cooker
Make a hot dog cooker that uses the power of the sun! You can use this solar oven to cook other things too!
Medium
Build a Model Earthquake
Create a mini-earthquake with a heavy object, elastic cord, and vibration sensor!
Hard
Exploding Volcano Model
Make a volcano erupt with air pressure! See how tephra (sand) is dispersed downwind to form a cinder cone.
Hard
Diffusion and Osmosis in Animal Cells
Discover how different solutions affect an animal cell and observe if substances pass through the cell membrane!
Medium
Does Music Help Kids Nap?
Does your child have trouble settling down for naps? Find out if music can help!
Medium
Artificial Intelligence: Can a Neural Network Play Connect 4?
Can an artificial intelligence program learn to beat a human at Connect 4? Find out in this project!
Hard
Sugar Content Change in Apples
Find out which type of apple changes the most in sugar content after being taken out of cold storage!
Hard
Busting Acne Bacteria
Let's find out which acne medications are the most effective against bacteria that cause acne!
Medium
Decomposition by Soil Microbes
Have you ever wondered how soil microbes help break down organic matter? In this project, you'll explore the environmental factors that favor decomposition by soil microbes.
Medium
The Effect of Detergents on Plants
Can detergents really kill plants? Find out in this experiment!
Medium
Measuring the Sun's Diameter
Let's build an instrument to measure the sun's diameter from Earth!
Hard
Taste Test: Cooking Potatoes
Do different methods of cooking potatoes produce a different taste? Find out by baking, pressure cooking, microwaving, boiling, and steaming potatoes and carrots to compare the results!
Hard
Uncovering Food's Nutritional Content
Learn how to determine the nutritional content of different types of foods with a few simple tests!
Hard
Magnetic Heat Engine
Build a toy that uses a candle as a heat source and a rare-earth magnet to create a heat engine!
Hard
Unraveling the Rubik's Cube
Can you figure out the secret behind the Rubik's Cube? Join us as we explore the mathematics of how the average variegation of a Rubik's Cube changes as sequences of ...
Hard
Bacteria Growth Race
Who will win the race? Will it be the bacteria from the feet of a human, a rabbit, or a chicken?
Medium
Measuring the Speed of Sound
Ever wondered how fast sound travels? Find out with this fun science project!
Hard
The Doppler Effect
Have you ever noticed that sound changes when you move? Find out why with this fun science project!
Medium
Vegetable Propagation
Learn how to grow your own vegetables with this fun science project! You'll explore different methods of vegetative (asexual) propagation and see which one works best.
Medium
Can You Make Jello with Fresh Pineapple?
Have you ever wanted to make Jello with fresh pineapple instead of canned? Find out if it's possible in this fun science project!
Hard
Exploring Black Holes
Have you ever wondered what happens when a black hole evaporates? In this project, you'll explore the properties of black holes and learn how to identify them in the sky.
Hard
Keeping Astronauts Warm on Mars
Have you ever wondered what kind of fabric would keep an astronaut warm on Mars? In this experiment, you will test different fabric combinations to see which one works best!
Medium
Bacterial Transformation
Transform bacteria with a DNA plasmid and turn a wild-type E. coli into a ampicillin-resistant strain that produces fluorescent protein!
Hard
How Does Sleep Affect Your Body?
Do you ever wonder how sleep affects your body? Find out by conducting an experiment to measure your vital signs while you sleep!
Medium
Fast Food Nutrition
Are you curious about what's really in your fast food? Find out by conducting this experiment!
Medium
The Effects of Slow Breathing on Runners
Do you ever hit the wall when running? Find out if slow breathing can help you run further and faster!
Hard
Hand Gestures and Personality
Do your hand gestures reveal something about your personality? Find out in this experiment!
Hard
The Digestion of Protein
Let's explore how the pH level of acid in our stomachs affects the digestion of proteins!
Hard
How to Make Oobleck: Is it a Liquid or Solid?
This simple Oobleck recipe of cornstarch and water is a fun introduction to the complex science of non-Newtonian fluids!
Easy
Cross-section of Planets: Modeling Terrestrial Interiors in a Bottle
Create your own planet! Shake it up and see how it's made in this fun, hands-on science experiment.
Hard
Exploring Color and Wavelengths in Space
Did you know that space isn't just black and white? Join us on a colorful journey through the cosmos and discover what the colors can tell us about the universe!
Hard
Water Strider Challenge: Make a Bug Walk on Water!
Can you make a pipe cleaner foil bug walk on water? Find out with this engineering challenge by building your own water strider and exploring the science of surface tension.
Medium
Solar System Scale Model on the Sidewalk
Create your own solar system model to scale on the sidewalk and take a walk through space!
Medium
Egg Drop Project: Protect the Egg!
Can you protect a raw egg from breaking when dropped from high up? Have fun in this engineering challenge!
Easy
One Minute Spaghetti
Science makes it possible to cook spaghetti in just a minute! Soak it first, then cook in a flash. Save the planet while enjoying your favorite dish!
Easy
Paper Airplane Challenge
Let's see which paper airplane can fly the farthest! Fold, decorate, and launch your own planes to find the winning design.
Easy

High School Science Fair Project FAQ


What are some easy high school science fair projects?

High school students can have a blast with science by trying out any of these easy science fair projects. These science fair projects teach important scientific concepts while making learning fun and enjoyable.

  • Growing Pineapples

  • Osmosis in Eggs

  • The Effects of Salt and Sugar on Water

  • Detecting Infrared Light

  • Solar System Scale Model on the Sidewalk

  • Temperature's Effect on Seawater

  • Decomposing Plastic Spoons

  • Color and Taste

  • Glowing in the Dark

  • Hand-Eye Coordination and Age

More details on these science fair projects right above the FAQ!


What is the best high school science project ever?

We highly recommend the Osmosis in Eggs science fair project for high school students. This experiment demonstrates how water moves through a membrane until it's balanced on both sides. By testing how different factors like salt, sugar, and temperature affect osmosis, you can learn more about this fascinating process and its real-life applications.

If you're looking for more high school science projects, check out the high school science fair projects at the top of this page! 

Check out more Best Science Fair Projects


What are some cool high school grade science fair projects?

Get ready to be amazed by these super cool science projects for high schoolers! With just a few simple things, you can be fascinated by science and have tons of fun with these cool high school science projects!

  • Create a Hand-Drawn Hologram

  • Detecting Infrared Light

  • Growing Pineapples

  • Galileo's Inclined Plane Experiment

  • Are Dogs Color-Blind?

  • Osmosis in Eggs

  • The Effects of Salt and Sugar on Water

  • Plant Pavlovian Conditioning

  • Uncovering Chaos: Precision and Iterative Processes

  • Jet Lag in Hamsters

More details on these science fair projects right above the FAQ!


What are 5 testable questions for high school?

A testable question is a question that we can answer through a science experiment. To do this, we do a control science experiment, then we change one thing in the experiment to see how it affects what happens. This is how we can discover the answer to our question!

  • Do detergents affect plant growth?

  • Can drink and food taste different just by changing its color?

  • Does the color of light affect photosynthesis?

  • Does temperature affect seed sprouting?

  • What makes popcorn pop?

Here are more testable questions along with their science projects


What are the top 10 science projects for high school?

These are our top 10 science projects for high school, with projects from Biology, Chemistry, Physics and Math. These projects can be used as science fair project ideas or as a fun experiment to explore different areas of science!

  • Jet Lag in Hamsters

  • Growing Pineapples

  • Osmosis in Eggs

  • Create a Hand-Drawn Hologram

  • Are Dogs Color-Blind?

  • The Effects of Salt and Sugar on Water

  • Plant Pavlovian Conditioning

  • Galileo's Inclined Plane Experiment

  • Uncovering Chaos: Precision and Iterative Processes

  • Detecting Infrared Light

Check out the project details right above the FAQ!


Can I do a high school science fair project in a day?

Yes! Doing quick experiments or building models are great options for science fair projects! If you're looking for some ideas to get started on your quick science fair project, we have plenty of topics to choose from.

  • The Solar System: See it in the correct scale!

Create your own solar system model to scale on the sidewalk and take a walk through space! Solar System Scale Model on the Sidewalk

  • Make Your Own Hologram!

Make a hologram with nothing more than a compass and some scraps of plexiglass! Create a Hand-Drawn Hologram

  • Finding the Invisible Light!

Have you ever wondered what kind of light we can't see? Detecting Infrared Light


What are some hands-on ways to find inspiration for my science fair project?

Science museums are great places to explore if you're looking for inspiration for your next science fair project or just want to learn more about science. Science museums, natural history museums, space museums, and discovery museums are all great places to do that! You can discover all sorts of interesting things about science and find cool project ideas for science fairs.

There may be free admission days or free passes to a science museum near you! Check your local library for free museum passes, nearby science museums for free entrance days and your credit card for offers.

Find a science museum near you and prepare to be awed by all that you can learn there! I always learn something new and am inspired whenever I go to a science museum!


How do I start a science fair project?

Science fair projects are a fun and unique way to discover science by asking a question and doing a science project. We'll help you find a science fair project idea and guide you through the process of doing and presenting your science fair project with Science Fair Coach's Science Fair Project Guide.


What should I do after I have a science fair project idea?

If you have a science fair project idea, Science Fair Coach can help you turn it into a full science fair project! Starting at Introduction to Science Fairs, we'll guide you through how to do a science fair project, from designing and conducting your experiment to collecting and analyzing your findings. Then, we'll help you showcase your results on a science fair board with our Guide to Science Fair Posters.


How do I make a science fair board?

Your science fair board is where you show off your science fair project for everyone to see and learn from. With our Guide to Science Fair Posters, you can make sure your science fair board stands out and impresses at the science fair!


What is the scientific method?

The 7 steps of the scientific method helps us understand how nature works. Learn how the scientific method is used in a science fair project example, and how it's evolved through history as scientists used different ways to learn about nature with our Guide to the Scientific Method!


What is the engineering design process?

The 6 steps of the engineering design process helps us design an effective solution to a problem. Learn how to use the engineering design process with the example of the egg drop challenge in our Guide to the Engineering Design Process!


Where can I find a science fair competition?

Science fair competitions are an excellent opportunity to explore science. One of the of the premier science advocacy organizations, the Society for Science, is associated with more than 400 science fair competitions in almost every US state, as well as over 70 other countries, regions, and territories. You can find out if there's a Society of Science affiliated science fair near you!

The www Virtual Library: Science Fairs website also has a collection of science fairs from all over the world, as well as national, state, regional, local, and virtual competitions!

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