Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Study history of aerodynamics of arrow design to create a perfect arrow. Test arrows by shooting at an archery target.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

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 experiment has students test whether a snail moves faster on concrete or dirt.

Research overview of architecural acoustics. Design and build a whispering wall from wood or plastic. Test which materials work best.

Create your own light bulb and test filaments of different thicknesses to see which keeps the bulb burning for the longest time.

Test whether cutting up meats will make it cook faster than just cooking it whole.

Research information on vitamin content in foods, Examine the effect of vitamins, test organic samples of fruits, meats, grains for vitamin content.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Design and build an invention inspired by Rube Goldberg's designs. Build your invention. Test the machine, write a detailed report.

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

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Research active ingredients in anti-aging creams. Test skin creams on volunteers, document the effectiveness of the creams with before an after photographs.

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

This science fair project idea determines whether the hand a person writes with relates to which side they will choose from in a fake taste test.

Devise list of randomly chosen words, test how many words volunteers can remember. Compare results of adults and children. Which have better memories?

Research camouflage products and techniques, test quality by timing volunteers. Calculate the average length of time to recognize the subject.

In this cool science experiment, test and compare the adhesive holding strength of homemade casein glue versus commercial glue.

Science fair project that helps you create your own compost pile in order to test the efficiency of different methods of composting.

The aim of this science fair project is to examine the differences between brands of bottled water and analyze consumer preferences through a taste test.

Polymers remove oil from contaminated waters. The purpose of this science project is to test the effectiveness of a polymer in cleaning up an oil spill.

Compare the amount of ozone in various locations with this science fair project that will have your kid create her own ozone strips!

Consult mechanics, automotive specialists for advice. Build a real engine or a scale model. Test and demonstrate its mechanical properties.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Test the effects of left and right handedness on writing speed and penmanship. Volunteers hand-copy the same paragraph of text, which samples look neater?

Test for a correlation between perceived color and heart rate. Using a stethoscope and stop watch, measure the heart rate (beats per minute) of volunteers.