Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

This science fair project idea identifies trees using a dichotomous key.

This science fair project idea determines what household items are good conductors of electricity.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

This science fair project idea determines what household items are good conductors of electricity.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

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

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

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

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

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

Examine the effect of pressure on carbonation in soda.

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

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

This science fair project idea explores whether color affects a person's emotional state.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Find out whether matte or shiny nail polish lasts longer.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

This project explores ways to prevent static electrical shocks.