Ch. 9 Vocab.- Sarah

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Across
  1. 1. The dierct transfer of thermal energy through a substance or form of one object in the physical contact with another.
  2. 3. The outermost zone of the earth's atmospere that extends into space itself.
  3. 5. The layer of atmosphere closest to the Earth's surface.
  4. 6. The science of the Earth's atmosphere, especially the weather.
  5. 8. The warming of teh lower atmosphere by infrared radiation that is radiated by the Earth's surface after it absorbs visible radiation from the sun.
  6. 9. The condition of the atmosphere at a given time.
  7. 14. The streamers of light that appear in the sky of the Northern Hemisphere.
  8. 15. The envelope of the gaseous mixture surrounding Earth.
  9. 17. An atom or molecule having a positive or negative charge.
Down
  1. 2. A layer if concentrated ozone laocted 20-50 km above the harmful forms of ultraviolet light
  2. 4. Any of the gases present in the atmosphere that enhances the absorbtion of infrared radiation by the atmosphere.
  3. 5. The zone above the homosphere.
  4. 7. The Southern Lights.
  5. 10. The indirect transfer of thermal energy from one place to another by movement of the currents of cooler, more dense matter into regions of warmer, less dense matter.
  6. 11. A visible trail of condensed water vapor or ice crystals forming in the wake of an aircraft.
  7. 12. A high-speed meandering wind current usually flowing from east to west at altitudes of 15-25 km.
  8. 13. This gas makes up 78% of the Earth's atmosphere.
  9. 16. A colorless, tasteless, odorless gas that forms approximately 21% of the Earth's atmosphere and is the essential element for respiration.