Use a dichotomous key to identify plants or animals.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

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

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

Evaluate the ability of a biodegradable dish detergent to increase the penetration of water in hydrophobic soils.

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Science fair project idea that measures fuel efficiency in cars. Calculate cost per mile by comparing fuel cost and consumption data.

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

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

In this science fair project, young children notice and track changes in trees throughout the year.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

What is a series circuit and how does it work? Learn about voltage, electrical current, and resistors in this cool science experiment!

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

This middle school science fair project evaluates test subjectsâ ability to determine what a person is feeling by reading their facial microexpressions.

This science project involves comparing the relative effectiveness of salt, pepper and dehydration in food preservation.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

This science fair project determines if the allelopathic chemical produced by the black walnut tree biodegrades immediately or persists over several days.

This project compares the strength of one, two, and three-ply toilet paper.

This cool air pressure demonstration has kids break a ruler using only a newspaper and atmospheric pressure.

Determine whether the relationship between a personâs armspan and height are genetic.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.