Atmosphere: Weather Prediction & Air Quality

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Across
  1. 5. an instrument for measuring the speed of the wind, or of any current of gas.
  2. 10. a device that shows the cardinal directions used for navigation and geographic orientation.
  3. 11. an expert in or student of meteorology; a weather forecaster.
  4. 13. an instrument for measuring and indicating temperature.
  5. 14. a map showing the state of the weather over a large area.
  6. 15. a mechanical device attached to an elevated structure; rotates freely to show the direction of the wind.
  7. 17. balloon that carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed.
  8. 18. the transition zone where a warm air mass is replacing a cold air mass.
  9. 20. a whirling mass of cool, dry air that generally brings fair weather and light winds.
Down
  1. 1. an instrument for measuring the humidity of the air or gas.
  2. 2. a whirling mass of warm, moist air that generally brings stormy weather with strong winds
  3. 3. the state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, rain, etc.
  4. 4. a psychrometer that can be whirled in the air until the reading of the wet-bulb thermometer reaches a constant value.
  5. 6. the weather conditions prevailing in an area in general or over a long period.
  6. 7. an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude.
  7. 8. the envelope of gases surrounding the Earth
  8. 9. a type of satellite that is primarily used to monitor the weather and climate of the Earth.
  9. 12. the transition zone where a cold air mass is replacing a warm air mass.
  10. 16. a unit of speed equal to one nautical mile per hour.
  11. 19. a device for collecting and measuring the amount of rain that falls.