1. 3. some of the harmful radiation from the sun.
  2. 4. trapping of heat near a planet's surface by certain gases in the planet's atmosphere.
  3. 5. period of scarce rainfall.
  4. 6. particles or liquid droplets in the atmosphere.
  5. 9. of Earth's rotation on the direction of winds and currents.
  6. 11. transfer of heat by the movement of a fluid.
  7. 12. calm areas where warm air rises. They occur at the equator where the sun heats the surface strongly.
  8. 14. fire that spreads quickly over a natural area.
  9. 15. parts of Earth that include the crust, mantle, and core.
  10. 17. and land breezes over a large region that change direction with the seasons.
  11. 18. of Earth's atmosphere at a particular time and place.
  12. 19. is the second layer of the atmosphere and contains the ozone layer.
  13. 20. of glacial advance.
  14. 21. year-after-year weather patterns in a given area.
  1. 1. abundant gas in the atmosphere.
  2. 2. of Earth that consists of water
  3. 5. of the atmosphere in which Earth's weather occurs.
  4. 7. of water in a normally dry area.
  5. 8. layer of Earth's atmosphere.
  6. 10. that falls to Earth as rain, snow, hail, or sleet.
  7. 13. envelope of gases that surrounds the planet.
  8. 15. cooler regions on the surface of the sun.
  9. 16. second most abundent gas in the atmosphere.
  10. 22. dry regions with extreme temperatures.