COMSTOCK PARK, Mich. — Rising air is all around us— outside and inside. It's what meteorologists call "convection." Warm air is lighter and less dense than cold air, so it has buoyancy and wants to ...

This experiment demonstrates how water at different temperatures has different densities, creating beautiful layering effects. You'll see how warm and cold water interact and learn about density ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

FARGO - Many handle this cold weather by staying inside or escaping to a warmer climate. But animals who live in the Arctic don't have that option, instead they have blubber. This is an experiment to ...