Fourth Grade Science Test #8

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Across
  1. 4. precipitation which eventually trickles into streams
  2. 6. process by which liquid water becomes water vapor
  3. 9. these winds help regulate the earth's temperature, helped sailors form trading routes, bands of winds which change at certain latitudes
  4. 10. the rise of ocean water surrounding a hurricane
  5. 13. weather conditions of a certain area over time
  6. 14. a large body of air that has the same temperature and humidity
  7. 15. boundary between two different air masses
  8. 16. meteorologists measure weather ? to make a forecast: temperature, air pressure, humidity, precipitation, wind direction, wind speed
  9. 19. forecasts that are usually accurate
  10. 20. stream causes thunderstorms to move from west to east, band of wind high above the earth, discovered during World War II
  11. 21. caused by constant movement of air
  12. 22. an instrument used to detect air pressure changes and forecast
  13. 24. this part of the atmosphere has the greatest density of gases
  14. 26. rotates around a low-pressure area
  15. 28. happen most often when the ocean's temperature is warm
  16. 30. a seasonal wind
  17. 31. process by which water vapor changes back into very tiny droplets of liquid water
Down
  1. 1. a scientist who studies weather
  2. 2. there is more of this gas in the air than any other
  3. 3. a severe snowstorm
  4. 5. cloud at ground level
  5. 7. prolonged period of dryness
  6. 8. weather ? is a weather event caused by specific conditions
  7. 11. air surrounding the earth
  8. 12. means a tornado has been spotted
  9. 17. a cyclone that develops over hot land
  10. 18. sun's ? energy controls the water-cycle process
  11. 21. heat energy from the sun causes evaporation of the earth's water; as water vapor rises, it cools and condenses, forming clouds; as a cloud becomes colder, precipitation falls from it; precipitation waters the earth into streams, runs off, and eventually returns to the ocean; the water cycle happens continuously
  12. 23. any form of water falling from the sky to the earth
  13. 25. happens in the lower atmosphere, the condition of the air
  14. 27. ? effect the atmosphere's ability to keep heat from easily escaping into space
  15. 29. electricity that travels from one cloud to another or between a cloud and the ground