This science fair project idea investigates whether rocks containing geodes can be determined from the outside.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project investigates why the number of visible stars changes from place to place.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

This science fair project idea explores discover whether mixing solutions of equal distances from neutral pH (7) will create a solution close to pH 7.

Will your liquid weigh less once you remove the fat from it? Find out in this science fair project idea.

This social science experiment assesses whether the timing of peak mental performance shifts from afternoon to morning as we age.

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

Learn about how we localize objects and beings in space through sound and about monaural auditory mechanisms and binaural auditory mechanisms.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Science fair project that determines whether disinfectant sprays or disinfectant soaps are more effective at removing bacteria from hands.

The Galileo inclined plane physics experiment was one of the first ways scientists calculated acceleration due to gravity. Do it yourself in this project!

What is vegetative reproduction? Find out how you can clone plants and regrow cabbage from a stem in this cool experiment!

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

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.

Demonstrate the principle of jet propulsion in this science fair project by building a rocket from household materials.

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Determine if picking up fallen food in 5 seconds or less prevents the transfer of bacteria from the ground.

The goal of this science fair project is to demonstrate the effects of oxidation by writing a message in invisible ink made from lemon juice.

Study and categorize the functions and types of genes. Run gene experiments chosen from links. Analyze data, explain ideas in a detailed report.

Administer IQ tests to volunteers. have one group practice typical IQ test problems. Then compare results of the two groups.

Do human lie detectors exist? Charge up your powers of observation to see if you can tell a lie from the truth.

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

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

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

Which type of sunglass lenses gives you the best protection from the sun's harmful UV rays? Find out in this cool science project!

In this science fair project, students use the streak test to tell minerals apart from each other.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.