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Science Fair Project Ideas

Education.com has assembled a vast collection of science fair project ideas written by science teachers, professional scientists, and educational consultants on popular science fair topics ranging from physics and chemistry to biology and even sociology. We offer free science fair ideas suitable for every grade level, be it preschool, kindergarten, elementary school, middle school, or high school. Check the boxes in the sidebar to filter your results, or use the search bar to find that perfect science fair project or experiment your child will be sure to love.

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1,618 results

Floating Paper Clip

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Hero's Engine: Example of Newton's Third Law

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

What Are the Layers of the Earth?

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Air Density, Convection, and the Movement of Air Molecules

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Heat Convection in Liquids

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

How to Find Specific Gravity of Minerals

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

The Limewater Carbon Dioxide Test

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

The Chemistry of Dyeing Easter Eggs

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Solar Eclipse Model

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

Why Does the Moon Glow?

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

What Causes the Seasons to Change?

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

The Rings of Saturn: A Scale Model

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

Light Absorption and Color Filters

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

Which Substance When Dissolved in Water will Conduct an Electrical Current?

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

Can Hydrogel Crystals be used as a Drug Delivery System?

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

Can Hydrogel Crystals be Used as a Sensitive Humidity Indicator?

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Can Crystals Show Color Mixing?

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Which Addition to Hard Water would Reduce its Conductivity, Washing Soda or Rain Water?

This science fair project idea focuses on the use a conductivity device to determine the ionic concentrations of hard water.

Good and Bad Lipids

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

What are the Effects of Light Intensity on the Rate of Photosynthesis and Oxygen Production in Plants?

This science fair project idea focuses on the production of oxygen by plants during the photosynthesis process.

If Starch is Composed of Sugar Why Isn't Starch Sweet?

This science fair project focuses on the use of the enzyme amylase found in human saliva to break down starch into sugar.

Are All Sugars the Same?

This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).

This science fair project idea determines whether plants grow better in soil or in fish ponds.

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