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100 Science Fair Projects For High School

100 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
How to Make Oobleck: Is it a Liquid or Solid?
Get your hands messy with this mysterious substance! Is it a liquid or a solid? Mix, squish and play to uncover its secrets!
Easy
Rock Hardness Challenge
How hard is that rock? You can learn how to classify your own rocks by their hardness just like geologists!
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
Temperature's Effect on Seawater
What happens to seawater when the ocean temperatures rise? Let's explore how temperature affects the pH and salinity of seawater!
Hard
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
Uncovering Fall Colors
Have you ever wondered why leaves change color in the fall? Let's find out by using chromatography to separate the colors of a green leaf!
Medium
Can Exercise Improve Test Scores?
Does physical activity before an exam help you do better?
Medium
Plastic Milk
Make your own plastic milk from household items!
Easy
Glowing in the Dark
Have you ever wondered how to make glow-in-the-dark stickers glow longer?
Medium
Monarch Migration and Global Warming
Can Monarch butterflies survive wet and freezing cold temperatures brought on by global warming? Find out in this science project!
Hard
Harnessing Solar Power
Learn how to use parabolic mirrors to get the most out of solar cells and turn sunlight into electricity!
Hard
Firewood Heat Experiment
Do different types of firewood produce different amounts of heat? Find out in this fun experiment!
Hard
Hand-Eye Coordination and Age
Does age affect how well you can catch a ball?
Medium
Acidifying Our Oceans
Let's explore how carbon dioxide affects the acidity of our oceans!
Medium
Acid Rain and Guppies
Can acid rain hurt guppies?
Medium
The Effects of Sea Water on Bamboo
Can sea water help or hurt bamboo plants? Find out in this experiment!
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
Soap Bubbles in Carbon Dioxide
Have you ever wondered how long soap bubbles can stay afloat in carbon dioxide? Let's find out!
Medium
Galvanic Cells: A Science Project
Have you ever wondered how electricity is made? In this science project, you will explore the power of galvanic cells and discover how electricity is created!
Hard
Keeping it Chill
Let's find out if aluminum foil can keep a bottle of water cold for a longer period of time!
Hard
Does Sample Size Matter?
Do you want to find out if the number of people you survey affects the accuracy of the results?
Hard
Waterless Urinals: A Science Project
Let's explore the differences between waterless and water-based urinals and see which one is more hygienic!
Hard
Temperature and Solubility
Let's explore how temperature affects the amount of substances that can be dissolved in water!
Medium
Music and Sleep: A Science Project
Does classical music help children fall asleep faster? Find out in this science project!
Hard
Levitating with Antigravity
Have you ever wanted to defy gravity? With this experiment, you can! Learn how to make a lifter that will levitate using the Biefeld-Brown effect.
Hard
Exploring Cave Formations
Discover how stalactites and stalagmites form in caves with this fun experiment!
Medium
Building Strong Bridges
Learn how to build bridges that can hold a lot of weight using triangles and squares!
Medium
Exploring the Kingdoms of Life
Take a journey into a drop of water and explore the five kingdoms of life!
Medium
Investigating Insects on Trees
Join us on an adventure to explore the different kinds of insects living on three different species of trees!
Easy
Odds of Being You: A Zoomonster from Planet Planktonia
Ever wondered what the odds are of you looking like your relative? Let's take a trip to Planet Planktonia and find out!
Hard
Plantfairies and Plantmonsters: Adventures in Mendelian Genetics
Join us on an adventure to save the world from mutant plantmonsters! We'll use Mendelian genetics to identify plantfairies that can be used for biocontrol projects.
Hard
The Impact of Plant Communities
Discover how different types of plants can affect the biodiversity of a region!
Medium
Music and Blood Pressure
Does music affect your blood pressure? Find out in this fun experiment!
Hard
Gender Differences in Lung Capacity
Find out if boys have a higher or lower lung volume than girls in this fun experiment!
Medium
Acid Rain and Lichens
Does acid rain have an effect on lichens? Find out in this experiment!
Hard
Build a Model of Sea-Floor Spreading and Subduction
Learn about plate tectonics and earthquakes by building a model of the Earth's outer 300 km!
Hard
Wood Expansion and Shrinkage
Learn how humidity affects the size of different types of wood by measuring and drying them in an oven!
Hard
Cooking Oil and Saturated Fat
Let's find out which cooking oil has the highest saturated fat content and how long it takes for the iodine test to lose its color!
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
Learning a New Language: Age Matters
Can adults learn a new language faster than children? Find out in this science project!
Hard
Video Games and Obesity
Do you love playing video games? Do you know how it affects your health? Find out in this science project!
Hard
The Power of Antibacterial Soap
Does antibacterial soap really kill more bacteria than regular soap? Find out in this fun science project!
Hard
Improving Memory with Story Linking
Can you remember 10 animals just by hearing a story? Find out how story linking can help you improve your memory!
Hard
Comparing Mattress Sutures
Are horizontal mattress sutures stronger than vertical ones? Find out in this experiment!
Hard
Reducing Nitrate Levels in Water
Discover how denitrifying bacteria can help reduce nitrate levels in water and save the aquatic ecosystem!
Hard
Bernoulli's Principle and Shapes
Discover how the Bernoulli's Principle works with different shapes and how it affects lift!
Hard
Planting Companions
Plant different types of plants together to see if they help each other grow better!
Hard
The Stroop Effect and Age
How does age affect our ability to process conflicting information? Find out in this science project!
Hard
Cell Phone Radiation: Does it Heat Water?
Can cell phone radiation heat up water? Find out in this science project!
Hard
Comparing Obesity Rates
Are African-American teenagers more likely to be obese than Caucasian teenagers? 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
Propeller Thrust Experiment
Find out how propeller size affects the thrust produced with this fun experiment!
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
Skyscrapers and Wind Forces
How do skyscrapers withstand the force of wind? Build model skyscrapers and find out!
Hard
Cleaning Contaminated Soil
Can oil absorbing polymers help clean up contaminated soil and make it suitable for growing plants? Find out in this science project!
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
Electricity and Plant Growth
Can electricity help plants grow faster? Find out in this science project!
Hard
Electrolysis and Voltage
Have you ever wondered what happens when you increase the voltage during electrolysis? Find out in this science project!
Hard
Sunlight and Bacteria Growth
Does sunlight kill bacteria in water? Find out in this science project!
Hard
Corked Bats vs. Wooden Bats
Does a corked bat make a baseball travel further than a wooden bat? Find out in this science project!
Hard
Green Tea and Daphnia
Can herbal green tea reduce the heart rate of daphnia? Find out in this science project!
Hard
Acid Rain's Effect on Sunflower Growth
Does acid rain affect the growth of sunflowers? Find out by testing different pH levels of water on sunflower plants!
Hard
Sound Transmission: A Science Project
Does the density of a material affect how much sound it transmits? Find out in this science project!
Hard
How Glass Shatters
Find out what happens when you drop a metal ball on glass at different temperatures!
Hard
The Effect of Calcium on Brine Shrimp
Can calcium help brine shrimp eggs hatch faster? Find out in this science project!
Hard
Music and Sports: A Scientific Study
Does music help athletes run faster and farther? Find out in this fun experiment!
Hard
Music and Plant Growth
Does music make plants grow faster? Find out in this science project!
Hard
Hydropower vs Wind Power
Compare the efficiency of hydropower and wind power with this science project!
Hard
Speaker Size and Frequency Response
Does the size of a speaker affect its frequency response? 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
Faster Computer Performance
Does your computer take forever to start up? Find out how to make it faster with this science project!
Hard
Sweaty Shoes and Bacteria
Have you ever noticed a strong smell when someone takes off their shoes? Find out why and how to reduce it 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
Comparing Wood Strength
Are you curious to know which type of wood is the strongest? Find out by comparing the strength of solid wood with that of plywood in this science project!
Hard
Does Living Near the Sea Affect Water Consumption?
Do you live near the sea? Find out if it affects how much water you use!
Hard
Grounding Our Bodies for Better Sleep
Do you have trouble sleeping? Do you suffer from body aches and stress? This science project will explore how grounding our bodies while we sleep can help us get better ...
Hard
Wood Expansion and Shrinkage
Learn how wood changes size when exposed to different levels of humidity!
Hard
Vitamin D and Plant Growth
Does vitamin D help plants grow faster? Find out in this science project!
Hard
Bacteria and Toothpaste
Find out if brushing your teeth with toothpaste can reduce the amount of bacteria in your mouth!
Hard
Exploring Fractals
Discover how to create beautiful shapes and images using simple geometric shapes and mathematical formulae.
Hard
Temperature and Tuning Forks
Does temperature affect the sound of a tuning fork? Find out in this science project!
Hard
Natural Insect Repellant
Find out which natural insect repellant is more effective: DEET or lemon grass oil?
Hard
Speaker Size and Frequency Response
Does the size of a speaker enclosure affect the sound it produces? Find out in this science project!
Hard
The Effects of Sleep on Academic Performance
Do you ever feel like you can't concentrate in school because you didn't get enough sleep? Find out if lack of sleep really affects your grades in this science project!
Hard
Isotonic Drinks and Runners
Does drinking isotonic drinks help long-distance runners improve their performance? Find out in this science project!
Hard
Blocking UV Radiation
Learn how to protect yourself from the sun's harmful UV radiation by testing different types of glass!
Hard
Temperature and Resistance
Learn how temperature affects the resistance of a wire and how it affects the flow of electricity.
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
Garlic vs. Bacteria
Can garlic really fight bacteria? Find out in this science project!
Hard

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.

Don't worry about how much it costs to get into the science museum, as there may be free admission days or free passes to a science museum near you! Check your credit card for offers, your local library for free museum passes, and nearby science museums for free entrance days.

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 Science Fair Coach's Guide to the Scientific Method, we'll guide you through every step of the scientific method, 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 for others to learn from and enjoy.


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 Science Fair Coach's step-by-step guide, you can make sure your science fair board stands out and impresses at the science fair!


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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