This science fair project idea investigates the hardness property of minerals.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

This science fair project teaches students the differences between fruits and vegetables.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

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

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

This science project teaches students to classify different shapes of leaves.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

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

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?