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Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.

Learn about the horizontal and vertical motion of a projectile in this cool physics science fair project idea for advanced middle and high school students.

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

This science project examines the thermal properties of several major greenhouse gases.

In this experiment, you will find out how human error can cause faults in any science task. This includes experiments conducted by famous scientists also.

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

Check out this fun science fair project idea to explore how building on different types of soil affects the relative stability of buildings in an earthquake.

Explore this fun science fair project idea to investigate different microclimates in and around your home and their effects on the plant and animal life.

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

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

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

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

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!

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

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.

Try this simple activity with your middle schooler to help him develop an understanding of why scientific classification systems exist and how they work.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

Introduce your child to science with something they see everyday--their shadow!

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

If your child aspires to be the next Frank Lloyd Wright, we've got some tips on building sand castles that last.

This easy at-home experiment is a great way to "see" science.

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

In this science fair project, students will learn how to calculate the formula for the thermal decomposition of potassium chlorate.

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.