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!

Kids will love making clouds and learning how to make a water cycle model in this fun science fair project idea that explores evaporation and precipitation.

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?

The concept of metamorphosis is fascinating to children of all ages. Help your child's creativity take flight as she makes her very own butterfly life cycle.

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.

Plants need water to grow. In this project we learn how plants transport water from their roots to their leaves

This science project idea determines whether cold water boils faster than warm water.

Here's a simple craft activity that can help your youngster better visualize the life cycle of a frog as a circle.

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

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.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

This science fair project idea demonstrates that plants give off water.

Help your kindergarten science maven explore the water cycle without getting everything wet.

The objective of this science fair project is to investigate salt water density.

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

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.

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

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?

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.

Here's a simple science activity that will help your child better understand how wells bring us water.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

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

This experiment that explores water and air pressure will amaze your fifth grader as it appears that a single card is holding water in an upside-down glass.