An experiment that demonstrates why there are clouds in the sky. Start with air, invisible water vapor, particles we call condensation nuclei, and air pressure...the cloud comes later!

For this activity, students use models to observe that air is a fluid that flows due to temperature-driven density differences.

In this activity, learners will have an opportunity to solve a mystery. They will discover why a soda can collapses during a demonstration due to the effects of changes in temperature and atmospheric pressure. Students will gain further...

In this lesson, students will understand that temperature changes can cause density changes in water and in air.

In this demonstration, students observe how temperature changes can create a weather front, in particular how the mixing of warm and cold air can produce thunderstorms.

Learners are introduced to the basics of the Earth's weather. Concepts include fundamental causes of common weather phenomena such as temperature changes, wind, clouds, rain and snow. The different factors that affect the weather and the...