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

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

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.

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

Take advantage of the spring and summer sun in this arts and crafts activity that has your learner creating pretty flower prints.

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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

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

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.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

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?

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.