Investigate which substances are most effective at removing salt from water.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

The purpose of this science fair project is to investigate whether we can simulate how craters are formed and predict their size and shape.

Melt the ice, but save the lawn. The objective of this science fair project is to explore the effects of different substances on melting ice.

Check out this cool and free middle school science fair project idea on how to make a solar oven.

Determine the efficiency of multi-tasking by comparing how long it takes students to complete different tasks. Collate data, complete Summary Chart.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

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.

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 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.

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.

The apparent movement of the sun has been used to keep time since the bronze age. In this science fair project, kids plot solar time against mean solar time.

This science fair project idea focuses on the production of oxygen by plants during the photosynthesis process.

The objective of this project is to examine the ways in which a passive solar house may contribute to conservation of energy.

The objective of this science experiment is to evaluate the affects of high and low heat capacity on a material's heat retention ability.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.