Science fair project that compares tap water and bottled water for the presence of common impurities.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Science fair project that uses distillation to convert salt water into fresh water.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

The aim of this science fair project is to examine the differences between brands of bottled water and analyze consumer preferences through a taste test.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

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?

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 idea demonstrates that plants give off water.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Sure, you already know that water is made up of hydrogen and oxygen, but did you know that oxygen levels differ in different types of water?

This science fair project idea compares biodiversity between drops of water.

Boiling water in a paper cup is possible because of convection and the thermal properties of water and paper. Learn how with this fun science fair project idea.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea explores how water and ice can change the form of rocks.

Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

This science fair project idea examines which is the best way to get rid of water stains (stains caused by just water) on fabric.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Have fun with bubbles and find out why there are bubbles in your tap water in this cool science fair project idea.

Test whether plants can grow without sunlight and water.

This science fair project examines whether ocean water can be made safe to drink.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.