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What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

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

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

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.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

In this experiment we will be determining whether birds prefer certain colors of seed.

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.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Start your toy engines -- this is going to be a fast and friction-filled race!

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

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

This science fair idea is a great way for kids to explore static electricity. Kids will give a comb a static charge and watch as it separates pepper from salt.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

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

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

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

For your budding first grade scientist, all you need is some simple, natural materials to create an amazing ant farm. Here's how to get started.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

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

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

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.