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

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

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

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

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

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

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

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

This science fair project idea explores how far the âdanger zoneâ is from different types of caution signs.

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

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

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

This science fair project idea explores whether cats can be trained in the same way that dogs can.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

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

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

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