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Learn about the greenhouse effect- and get great science fair experiment ideas. Read more.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

Science fair project that compares tree leaf size and shape based on the leaf's position in the tree. Is their is a noticeable difference between high and low?

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

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

In this fun experiment, we'll find out how color affects heat absorption!

Check out this cool and free middle school science fair project idea on how to make a solar oven.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

Science fair project that determines which types of clouds are best at blocking harmful UV radiation.

This experiment will explore how manipulating a graph of historical information might reveal new information about data.

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!

Measure the effectiveness of detergent containing a UV-absorbing compound in blocking UV-A radiation. Use black light and UV detecting beads.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

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

In this activity, you child will learn about how heat changes food. On the next sunny day, head outdoors to make a treat in an outside oven! Here's how:

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

Use applied math to model orbital eccentricity in this cool science fair project for 7th grade.

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

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.

Kids learn about the color rendering index by finding the best lightning for makeup in this fun and original physics science fair project idea.

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

The objective of this project is to examine the ways in which a passive solar house may contribute to conservation of energy.