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

Science fair project which determines whether your current calorie intake will cause you to lose or gain weight over time.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project idea discovers the effect of (high) heat on animal cells.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Students identify variables that affect the duration of high school romances and analyze data to predict the success or failure of ongoing relationships.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

This science fair project idea quantifies exactly how accurate the cricket thermometer is.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

This experiment explores whether caffeine improves athletic performance.

This experiment will evaluate how texting and talking on cell phones influence reaction time.

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!

Science fair project that helps you create your own compost pile in order to test the efficiency of different methods of composting.

Research long-term effects and draft a questionnaire about frequency of marijuana use and average annual income. Interpret findings in a detailed report

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Boiling water in a paper cup is possible because of convection and the thermal properties of water and paper. Learn how with this fun science fair project idea.

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.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

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

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

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

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

The goal of this project is to create an exciting topographical map out of dough.

This science fair project idea determines if material and tensile strength of different types of skateboard wheels affects the velocity of the skateboarder.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Check out this cool science fair project idea to learn why it is important for kids to eat healthy foods like fresh fruits and vegetables.

This experiment evaluates whether there is a relationship between grade point average (GPA) and dating status.

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

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

Determine how proficient you are at making estimations and learn how to make more reasonable estimates.