In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

This project examines what types of objects burn and which burn faster and cleaner.

This science fair project will go beyond the simple definition of conservation to explore the different facets of what conservation means.

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.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

This project is about after-images and what possibly affects them.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

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

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

What is a series circuit and how does it work? Learn about voltage, electrical current, and resistors in this cool science experiment!

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

What if the shape of the Earth weren't spherical? How does its shape affect our gravity, climate, and tides? Model these questions in this cool project!

This science project examines the history of earthquakes and what we can do to prevent future disasters.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

What direction should solar panels face? It's not the direction you might think! This free and enlightening science fair project helps kids discover the answer.

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.

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.

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.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Thermometers are how we measure temperature, and we've all heard the terms "centigrade" and "Fahrenheit" tossed around, but what do they really mean?

Do people only "hear" what they want to hear? Explore pareidolia and psychoacoustics with this easy science fair project that pits melody against white noise.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Learn about what happens to a current-carrying wire in a magnetic field in this cool electromagnetism experiment!

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.