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

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

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

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

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

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

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

Test whether plants can grow without sunlight and water.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Discover whether a metal will expand under hot water.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Discover whether cold or hot water from the faucet will boil faster on the stove.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

This science fair project will help students learn about non-vascular plants, such as mosses.

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.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

In this project students experiment with making music using only glasses of water.

In this project, waves of vibrations are experimented with using water in glasses.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

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

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

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

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

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.