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!

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?

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

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

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.

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.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

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.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

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.

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?

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

This science fair project idea identifies clouds as a means of predicting the weather.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

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.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

How powerful is the reaction between baking soda and vinegar? Find out here!

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

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.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!