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

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

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?

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