How heavy is air? - Dan Quinn [TED-Ed]
You can stop watching at 4min 34sec.
Atmospheric Pressure 2:
The Layers of Earth's Atmosphere:
The Atmosphere Introduction [National Weather Service] This page covers the composition of the atmosphere.
Layers of the Atmosphere [National Weather Service] Read about the layers of the atmosphere.
Layers of the Atmosphere [CALIPSO Outreach] Interactive test on where different things belong in the homosphere.
Vertical Structure of the Atmosphere [NOVA PBS] Interactive on the homosphere. Useful information included.
The Temperature Gradient in the Homosphere:
Layers of the Earth's Atmosphere [Windows to the Universe] Make sure to view all the images under "Related Links."
The "Hole" in the Ozone Layer:
Refer to my last post for Module 2: Air. It covered ozone and has links on the topic.
Layers of the Earth's Atmosphere [Windows to the Universe] Click the links in the paragraph for thermosphere and exosphere.