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

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

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

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

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

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.

Check out this fun science fair project idea to explore fun facts about fruit juices and learn why do juices turn bad in the fridge.

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

In this science fair experiment, high school students fit the growth pattern of bacteria to a mathematical model and predict future colony expansion.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

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!

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

Solve the mystery of the unpoppable balloon in this 7th grade science experiment that demonstrates the process of heat transfer.

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

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

The objective of this project is to examine the ways in which a passive solar house may contribute to conservation of energy.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

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!

Kids make strong bubbles to investigate the effect different additives have on bubble life in this cool science fair project idea.

This science fair project will help learners determine whether algae can be made to grow by feeding it supplementary carbon dioxide.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

This science fair project idea examines reptile behavior and to determine whether reptiles are more active during warmer temperatures.

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