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Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

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

Discover how and which salt melts ice the quickest.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

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.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

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

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This science fair project idea investigates the difference in reaction times between boys and girls.

This science fair project idea explores whether white light can be separated into different colors.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

Find out whether packaged seeds actually do expire in this new science fair project idea.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

This science fair project idea investigates if fats add to the flavor of food.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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

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

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

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

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

This science fair project idea determines if the color of light affects the growth of plants.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature