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Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

Explore the best way to store popcorn kernels. It examines the impact of moisture and temperature on unpopped kernels.

Explore joule heating and resistance vs. temperature with this cool electricity science fair project that gets kids melting ice cubes with resistors.

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

This experiment examines whether storing your orange juice at different temperatures affects its acidity.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

This science fair project idea determines which flower lasts the longest.

This science fair project determines what effect substances have on ice, and which of these products most effectively melts ice.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

Find out whether cast iron or regular teflon pans heat up faster and also retain their heat longer.

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

Do your laundry and your science project simultaneously! This science fair project investigates whether the color of a garment affects the time needed to dry.

Explore properties of liquids and how temperature and salinity effect surface tension of liquids in this fun- filled science fair project idea.

Check out this fun science fair project idea to determine if the size of a particle affect the rate or speed of a chemical reaction.

Find out whether freezing or refrigerating destroys more bacteria. This is essential to consuming safe and germ-free food.

The objective of this science fair project idea is to find out whether refrigerating cosmetics will extend their shelf-life and longevity.

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

This science fair project idea determines whether land or water warms more quickly and investigates how solar radiation increases the temperature of surfaces.

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

What direction should solar panels face? It's not the direction you might think! This free and enlightening science fair project helps kids discover the answer.

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

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?

Test whether cutting up meats will make it cook faster than just cooking it whole.

Discover if temperature settings in a fridge make a drastic difference in terms of bacterial growth.

This experiment investigates if small changes in your diet can alter your basal body temperature.

Explore this fun science fair project idea to investigate different microclimates in and around your home and their effects on the plant and animal life.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

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

Fudge is one of very few desserts people make at home that is actually crystalline. What happens when the fudge crystallizes at different temperatures?

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.