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

Determine whether carpet placed on a lawn will kill grass and weeds. Choose an area of lawn that you would like to remove, record grass that is dead or dying.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

This science fair project evaluates which sense produces the fastest response time: hearing, touching, smelling or seeing.

In this science fair experiment, middle school students evaluate whether tone of voice can influence our ability to remember a list of everyday objects.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science fair project idea determines which flower lasts the longest.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This experiment investigates whether there are certain sounds that affect men and women differently

This science project is to discover which Black Walnut tree tissue contains the most concentrated amount of Juglone, a substance that works like an herbicide.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

Determine the differences between various bicep exercises, both in terms of how much muscle exertion they create and how they affect your heart rate.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

How does light affect plant growth? Do different colors of light work better than others? Find out in this classic science fair project idea.

Does fear cause the same physiologic responses in men and women? This experiment measures people's blood pressure and heart rate while watching a scary movie.

This science fair project idea explores substances that cause a bubble to last longer.

What happens when "coffee-addicts" miss coffee for 1 day? Find out in this science fair project idea!

Science fair project that compares the relative carbon dioxide concentrations of various gases, including different types of vehicle emissions.

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

This project will explore whether people are emotionally susceptible to suggestions of both humor and sorrow.

The purpose of this science fair project is to learn which substance best preserves apples. Learn about enzyme interactions in fruit and scientific processes.

This science fair project explores how salt and sugar affect the melting rate of ice in water.

This experiment investigates whether font choice affects peoplesâ ability to remember the information that they read.

This experiment investigates whether the primacy effect is observed more frequently in specific populations of people.

How do organic materials become soil? This science experiment measures what materials biodegrade.