American Chemical Society
Middle School Chemistry: Air, It's Really There
Explore the properties of air, and what happens to air when heated and cooled.
CK-12 Foundation
Ck 12: Earth Science: Temperature of the Atmosphere
[Free Registration/Login may be required to access all resource tools.] How different temperature gradients separate the atmosphere into distinct layers.
SMART Technologies
Smart: Layers of the Atmosphere
This notebook file takes students through the layers of the atmosphere with discussion opportunities for each.