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.

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?

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

This science fair project idea investigates how the shape of an object affects drag.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

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

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This project determines what category of person is most likely to be ticklish.

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

This science fair project idea determines which method of hand cleansing is the most effective.

Make a backbone model to explore human anatomy and life science.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

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!

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.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

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.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.