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4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

This biodiversity project examines the biodiversity in your own backyard.

This science fair project idea compares biodiversity between drops of water.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

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

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

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.

This science fair project idea examines which type of insulation holds in the most heat.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Take a dive into the candy jar with this yummy science experiment.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.