Thermometers are how we measure temperature, and we've all heard the terms "centigrade" and "Fahrenheit" tossed around, but what do they really mean?

Check out this fun middle school science fair project idea on Newton's third law of motion and how you can change the speed of a rocket.

This science fair project idea explores whether dogs do look like their owners.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

This science fair project idea examines whether boys and girls differ in reflexes.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Will the shape of an ice cube impact how fast the ice melts?

This science fair project idea measures and compares effects of chemical weathering, specifically carbonation, on different kinds of rocks.

Determine how effective animal camouflage is by simulating it in an indoor and outdoor setting.

This project examines how temperature affects the volume of gas in balloons.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

This science fair project idea determines if females or males tend to do better on optical illusion tests and whether certain age groups also do better.

This experiment strives to determine if tracking of conservation habits will lead to reductions in a family's electricity and water bills.

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

This science fair project idea focuses on the production of oxygen by plants during the photosynthesis process.

This science experiment explores why leaves change color in the fall and the role of photosynthesis in leaf coloration.

In this science fair project, students use hot and cold water to simulate what happens when a warm front meets a cold one.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

Check out this fun science fair project idea to learn how alkaline batteries convert chemical energy to electrical energy?

Science fair project that determines whether moths are attracted to one color of light more than others.

This science fair project idea determines the operating differences of AAA, AA, C, D batteries all with a 1.5 volt rating.

This experiment will examine and precisely measure the amount of sugar in various sodas.

Help your kindergarten scientist predict and observe as she explores the science of smell...and have a great time doing it, too.

Learn about emulsification and bile's roles in digestion, and investigate how the digestive enzyme lipase breaks down lipids.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Learn about calorimetry, make a bomb calorimeter, and experiment with combusting different nuts to see which one produces the most energy!

The objective of this science fair project is to observe the properties of friction and apply this knowledge to search for a near-frictionless surface.

Find out whether matching resonant frequencies can cause objects to shatter.