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

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

This science experiment tests if dog saliva can really help heal wounds.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

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

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

A simple science experiment exploring the physics of water pressure that's been amazing people since Medieval times.

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

This project examines what types of objects burn and which burn faster and cleaner.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

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

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

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

This easy at-home experiment is a great way to "see" science.

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

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

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

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Help your fifth grader embrace the roots--literally--of Mother's Day by growing carnations to honor mothers in you family's history.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

Have your child kick off their summer vacation by making a miniature water slide!