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

The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

Investigate how to keep your fruit fresh for longer. The purpose of this science experiment it to determine which kind of bag best preserves fruit.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

Use dirt and different colors of craft sand to make unique layers in a clear plastic cup to represent the layers of the Earth.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

Introduce your child to science with something they see everyday--their shadow!

Measure the speed of the earth's rotation using protractors and meter sticks. This science fair project measures the angle of the sun in relation to earth.

Determine if left-handed people have faster response times.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

Determine the efficiency of multi-tasking by comparing how long it takes students to complete different tasks. Collate data, complete Summary Chart.

The objective of this experiment is to evaluate which types of people are most impacted by the McCollough effect.

This experiment will explore the best way to create a perfect soft-boiled egg.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

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

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

In this science fair experiment, high school students fit the growth pattern of bacteria to a mathematical model and predict future colony expansion.

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

This science fair project idea examines which type of insulation holds in the most heat.

The purpose of this project is to determine if there are fluctuations in the rising and the setting of the sun and the position of the earth as it rotates.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

This experiment evaluates if the temperature of the environment that you work in affects your ability to perform mental tasks.

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

This science fair project idea examines whether people can decode scrambled messages.

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!

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

In this project students experiment with making music using only glasses of water.

This science fair project idea examines reptile behavior and to determine whether reptiles are more active during warmer temperatures.