The sun is highlighted as the driving force behind weather and the source of energy for our planet. Animations and video examples show the uniqueness of the Earth's atmosphere and how air is set into motion as wind when it is heated unevenly. Heat, wind, and pressure are all connected. Air with different temperatures are related to differences in weight (or pressure), which is what causes circulations (wind). The properties of hot and cold air are contrasted. Students learn to associate high or low pressure with calm or stormy weather. While storms generate wind, students see that wind pushes storms and weather systems around the Earth. We see that air in motion is constantly trying to balance heat so that no part of the Earth gets too hot or too cold.