We are surrounded by an extensive ocean of air known as the atmosphere.  But you may not realize that the atmosphere is composed of many different gases, and is separated into several different layers.

This self guided tutorial examines what composes the atmosphere, how the current atmosphere evolved, and the different layers that make it up.  Just click on the different links to navigate the page.  Enjoy!

Let's get started! Click here to Begin with the Current Composition of the Atmosphere.  Or, find a subject you're interested in below, under Contents.

Contents

• Current Composition
• Evolution of the Atmosphere
• Layers of the Atmosphere

                  - The Troposphere
                  - The Stratosphere
                  - The Mesosphere
                  - The Thermosphere
                  - The Ionosphere

   

• Pressure and Height in the Atmosphere
• Seasonal Atmospheric Temperatures
• Seasonal Pressure
• Seasonal Density
• Greenhouse Gases and Global Warming?
• References
• About the Authors