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

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

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

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

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.

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

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

Preschoolers are fascinated by how colors can be mixed to form new ones. This activity combines color mixing with the concept of melting for extra science fun.

Make pickled carrots at home! Here's a fun activity to get your child in the kitchen and make something special with no fuss or muss.

Time is an abstract concept that's difficult to grasp. But waiting for the turkey to come out of the oven on Thanksgiving is a concretely yummy experience.

This science fair project investigates how temperature of a room affects the burn rate of a candle.

Determine whether the application of Febreeze will lower the bacterial count.

This experiment investigates if stress alters body temperature.

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

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

Demonstrate the capillary function in plants by adding food coloring to glasses of water. Slice stalks of celery and leafy tops. Compare color of leaves

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Science fair project that creates fog using bottles of hot and cold water.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

The purpose of this science project is to determine which chemical best lowers the temperature of water in a cold pack and if the amount affects its use.

The objective of this science experiment is to evaluate the affects of high and low heat capacity on a material's heat retention ability.

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.

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

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.

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

In this science fair project, students examine how temperature affects sugar transport within a plant.

Can cells be frozen? This science fair project provides information to answer this question.