Sc 7: pp 164-166

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Across
  1. 6. in the thermosphere, absorbs solar radiation
  2. 7. to transfer energy, particles must ______
  3. 10. common in the thermosphere
  4. 11. protects earth from harmful radiation and meteorites
  5. 12. _______ is denser than the thermosphere
  6. 13. where the ozone layer is very thin
  7. 14. breaks apart nitrogen and oxygen
  8. 17. scientists feel that the ozone layer is decreasing due to the ______
  9. 18. uppermost layer of the atmosphere
  10. 19. Earth's average surface temperature
  11. 20. the mesosphere does not have an _________ to absorb ultraviolet radiation
Down
  1. 1. temperatures at the top of the thermosphere are ______
  2. 2. the mesosphere is ______ to study because it is too high for aircraft but too low for satellites
  3. 3. atmospheric layer above the stratosphere
  4. 4. gases in the atmosphere, such as water vapor & carbon dioxide, absorb and give off infrared radiation
  5. 5. provides the air we breathe
  6. 8. the ozone layer is particularly low here
  7. 9. surrounds and protects earth
  8. 10. controls the temperature on earth
  9. 15. _________ in the mesosphere decrease as altitude increases
  10. 16. the top of the thermosphere is __________ above Earth