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Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

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

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

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

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

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

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

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

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.

This science fair project will help students learn about non-vascular plants, such as mosses.

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

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

Explore if planting seeds in a certain direction will affect how fast it germinates.

This science experiment tests if dog saliva can really help heal wounds.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

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

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

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.