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This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

Check out this cool middle school science fair project idea to find the difference between organically grown and commercial brands of foods.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Science fair project that examines oxidation, reduction and chemical indicators by testing for the presence of the iodide in salt.

This science fair project idea determines the most effective method of preserving food.

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Here's a science activity to help your child investigate how seeds are designed to travel.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

This experiment will investigate whether reward or punishment is more apt to motivate people.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

In this experiment, recycled objects are separated to demonstrate how mixtures are made and the variance in the physical properties of their ingredients.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

Culverts transport seeds away from their original location to different places. This science project examines the effect of culverts on plant growth in streams.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

This science fair project idea explores whether there is a connection to the color a person wears and the way their emotional state is perceived by others.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Discover how and which salt melts ice the quickest.

The project researches how lubricants affect the mechanical advantage of a pulley.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.