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This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

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

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

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

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

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

In this project children practice the scientific method while playing with puffy paint.