EARTH'S ATMOSPHERE

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Across
  1. 2. the condition of Earth's atmosphere at a particular time and place.
  2. 4. fluffy,white clouds, usually with flat bottoms, that look like rounded piles of cotton.
  3. 7. a line on a weather map that joins places that have the same temperature.
  4. 9. an instrument used to measure changes in air pressure.
  5. 10. a rapidly whirling, funnel-shaped cloud that reaches down to touch Earth's surface.
  6. 12. a line on a weather map that joins places that have the same air pressure.
  7. 13. an instrument used to measure temperature.
  8. 14. scientists who study the causes of weather and try to predict it.
  9. 15. an instrument used to measure relative humidity.
  10. 18. a giant wave usually caused by an earthquake beneath the ocean floor.
  11. 19. a small storm often accompanied by heavy precipitation and frequent thunder and lightning.
Down
  1. 1. a tropical storm that has winds of about 119 kilometers per hour or higher.
  2. 3. An instrument used to measure precipitation.
  3. 5. the temperature at which condensation begins.
  4. 6. an instrument used to measure wind speed.
  5. 8. the boundary where unlike air masses meet but do not mix.
  6. 11. any form of water that falls from clouds and reaches Earth's surface.
  7. 16. amount of water vapor in a given volume of air.
  8. 17. wispy,feathery clouds made of ice crystals that form at high levels.
  9. 20. clouds that form in flat layers and often cover much of the sky.