1. Composition of the Earth's Atmosphere
... to exist as we know it. Though the greenhouse effect is sometimes portrayed as a bad thing, trace amounts of gases like CO2 warm our planet's atmosphere enough to sustain life. Global warming, on the other hand, is a separate process that can be caused by increased amounts of greenhouse gases in the atmosphere. Though the major components of the atmosphere vary little today ... warm, less dense air upward. This transfer of heat due to density differences is called Convection. Convection currents cause a constant exchange of cold, dense air for less dense warm air. GLOBAL WARMING Global wa...
- Word Count: 3528
- Approx Pages: 14
- Grade Level: High School