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In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

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.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

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.

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.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

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 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.

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

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!

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!

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.

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.