The Atmosphere Around You (Pages 274-279)

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Across
  1. 2. The thin envelope of gases that surrounds the planet
  2. 4. The ozone absorbs
  3. 6. Earth's atmosphere is ___ because it holds just the right amount of solar energy to protect life.
  4. 8. Example of a trace gas
  5. 9. The ____ provides most of the energy that drives Earth's systems.
  6. 10. Air pressure ____ as the altitude increases.
  7. 12. Oxygen is essential for _____ life.
  8. 14. Trace gases help _____ Earth by trapping solar energy.
  9. 15. Distance above sea level
  10. 16. Molecules of air pressure closest to the Earth are pressed ____ together.
Down
  1. 1. Air pressure can be affected by gravity and _______.
  2. 3. Layer containing 80% of the atmosphere by weight.
  3. 5. The most abundant gas in Earth's atmosphere
  4. 7. The troposphere is closest to Earth and experiences ___ conditions.
  5. 11. Energy from the Sun warm's Earth's atmosphere as it reaches its surface by _____.
  6. 13. Some of the energy that hits Earth's surface is absorbed bur some is ___ back into space.
  7. 17. Higher altitude means ___ air pressure