In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

The purpose of this science project is to determine whether the amount of air in a soccer ball affects how far it goes when kicked.

This project concerns activity happening millions of miles away, on the sun.

The objective of this science project is to examine the factors that affect the dispersion of oil in water, including water agitation.

This science fair project idea sheds some "light" on which color of candles burn the longest.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

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

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Dig into the physics of pool to explore some cool applied math and learn about what happens in an elastic collision of equal masses.

Students will investigate the illumination durations and intensities of different luminous substances of different colors of the spectrum.

Research hemispheric brain dominance in order to determine if you have a dominant side. Test foot, ear dominance. Record observations.

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

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

This science fair project idea investigates whether body language and heart rate can decipher who's lying and who's not.

Use a fish tank to simulate a pond! This science fair project explores the relationship between acid rain and the dissolved oxygen concentration of water.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Check out this fun science project idea on ecological succession and learn the main difference between primary and secondary succession.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

What is the Doppler Effect, or the Doppler Shift? The purpose of this science fair project is to determine how distance impacts the Doppler Effect.

Study emulsifiers and learn how they are used in food science, medicine, soaps and cosmetics. Identify which materials are created using an emulsifier.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

This science fair project idea determines if a particular chemical has an effect (increase or decrease) on the heart rate of Daphnia.

The objective of this science fair project is to determine whether drawing with the right side or the left side of your brain will produce a better picture.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

The goal of this science fair project is to determine which cheese grows mold the fastest: Vermont Cheddar, American, Brie, or Camembert?

How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.