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

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.

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

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

Science fair project that determines the correlation between the ability of selected materials to conduct heat and a material's density.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

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.

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

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

Will your liquid weigh less once you remove the fat from it? Find out in this science fair project idea.

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

Introduce the idea of measuring weight to your preschooler or kindergartener by making a fun and easy-to-use bungee scale to weigh household objects.

The objective of this science project is to examine the factors that affect the dispersion of oil in water, including water agitation.

Determine which environment keeps an ice cube frozen for the longest duration. Inspect and record your observations when cubes melt.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

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