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In science fair projects, middle school students discover why nitrogen fixing bacteria are important to plant growth.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Free science fair project idea examining how different types of water affect plant germination and growth.

Science fair project that models the subterranean movement of water, using Darcy's Law. How can this information be used in hazardous material spills?

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

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

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

This science fair project idea identifies and understands adaptations in birds.

Use a fish tank to simulate a pond! This science fair project explores the relationship between acid rain and the dissolved oxygen concentration of water.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

The purpose of this science fair project is to investigate whether cooking seeds before planting will speed up germination and growth.

Science fair project that measures the relative times it takes a plastic bag and a biodegradable plastic bag to decompose.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Plants and light seem to be good buddies, but how far does the friendship really go?

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

Do you think heat can affect a plant's growth rate?

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Determine whether carpet placed on a lawn will kill grass and weeds. Choose an area of lawn that you would like to remove, record grass that is dead or dying.