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

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

This science fair project idea explores the egg's thin membrane.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

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

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This science fair project idea investigates how color affects temperature.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

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

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.