This 31 piece set features two Layers of the Atmosphere illustrations (regular and space view). The Ground to Sky View illustration includes the troposphere, ozone layer, stratosphere, mesosphere, thermosphere, and exosphere. The Space View also includes the tropopause, stratopause, mesopause, and thermopause. Also included are individual illustrations of elements found in each atmospheric layer, and a pie chart of the atmosphere's composition (nitrogen, oxygen, argon, and other gasses). This