Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

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

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

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.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

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

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

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

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!

This simple experiment serves as an introduction to the greenhouse effect.

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

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.