Use pepper and soap to discover some fun facts about the properties of water.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

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

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

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 examine the effects of temperature on salt and water solutions, as they form crystals over time.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

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

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!