In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Find out whether a longer airplane will fly farther or a wider paper airplane.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

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

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Find out whether packaged seeds actually do expire in this new science fair project idea.

This science fair project idea investigates whether plants can survive being frozen.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project idea determines if the color of light affects the growth of plants.

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

How do organic materials become soil? This science experiment measures what materials biodegrade.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

This science fair project idea explores whether talking to a plant will help it grow.

This project examines whether playing music during class helps students learn or if it distracts students from learning.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.