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High School Science Fair Projects

Need a science fair project that's fun, engaging, and appropriately rigorous for a high school science fair? Education.com has assembled a rich collection of high school science fair projects and high school science fair project ideas written by our team of professional scientists, science teachers, and educational consultants. We offer free high school science experiments on every science fair topic, including physics, chemistry, biology, engineering, and even psychology. Check the boxes in the sidebar to filter your results, or use the search bar to find a winning idea for your upcoming science fair. Hundreds of good science fair projects are only a click away.

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Does Tea Stain your Teeth?

Can you stain teeth with tea, coffee, or coke? Explore how in this science fair project idea.

Vegetable Power

This science fair project idea explores if an LED light can be powered by vegetables and/or fruits.

Does Chewing Gum Help You Concentrate?

This project investigates whether chewing gum can help a majority of people with focus and concentration.

How Does Microwave Radiation Affect Different Organisms?

This experiment explores how microwave radiation affects fungi, bacteria, and plant life.

How Fast Does Light Travel in Water vs. Air? Refraction Experiment

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

Oersted's Experiment

In this project, you'll create Oersted's experiment, which relates to how electric currents create magnetic fields.

Does Aspirin Help Plants Grow?

Observe if dissolved aspirin will help plants grow healthier and faster in this science fair project idea.

This science fair idea project identifies the active ingredients in soap and experiments with the properties of soap.

What Music Does Bacteria Enjoy the Most?

This experiment explores whether music affects the growth of bacteria and could help figure out better ways to process sewage and other microbe-assisted duties.

Science fair project that determines whether algae can be made to grow by feeding it supplementary carbon dioxide.

How to Make Salt Water Drinkable

This science fair project examines whether ocean water can be made safe to drink.

Antacid Potentcy

Science fair project which tests which antacids are most potent by measuring how well they neutralize the acid in lemon juice.

Is a Denser Fruit Healthier?

Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.

Can You Cook Using Only Sunlight?

Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).

How to Make a Lie Detector

This science fair project idea investigates whether body language and heart rate can decipher who's lying and who's not.

Is the Earworm Effect Real?

We're all familiar with the idea that some songs âget stuck in your head.â This experiment explores the validity of that claim.

Testing the Birthday Paradox

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

How Does time Perception Change As You Get Older?

This science fair project idea studies how time perception changes with age.

Diffraction Grating Experiment: Wavelength of Laser Light

This awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

Measuring Sugar in Soda

This experiment will examine and precisely measure the amount of sugar in various sodas.

How Long Does It Take To Remember Something?

This science fair project idea discovers the average time it takes for a person to remember something completely.

How Much Oxygen is in the Air?

Science fair project that determines what percentage of air is made up of oxygen by examining the chemical reaction between oxygen and rust.

Texting Versus Talking: The Effects of Cell Phones on Reaction Time

This experiment will evaluate how texting and talking on cell phones influence reaction time.

Does Whitening Toothpaste Work?

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

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