Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this experiment you will replicate the mummification process by making a hot dog mummy.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

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.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

This science fair project teaches students about wilting and browning of salad greens.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Discover whether cold or hot water from the faucet will boil faster on the stove.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This science fair project idea examines whether boys and girls differ in reflexes.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

Examine the effect of pressure on carbonation in soda.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

This science fair project idea produces varying pitches of sound.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.