Atmospheric Pressure

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Across
  1. 4. Dampness, Humidity ( 8 letters)
  2. 6. Depth of the sea (8 letters)
  3. 8. What pressure is exerted by the atmosphere on the earth's surface? (2 words, 15 letters )
  4. 10. Atmospheric Pressure decrease with the increase of what. ( 8 letters )
  5. 11. Variations of what causes differential heating of the atmosphere( 3 letters )
  6. 12. Compression, Amount per unit (7 letters)
Down
  1. 1. an instrument used especially in forecasting the weather and determining altitude.
  2. 2. force applied perpendicular to the surface of an object( 8 letters)
  3. 3. It is an extended version of the sky
  4. 5. degree of hotness or coldness measured on a definite scale. ( 11 letters )
  5. 7. Travel in waves and can evaporate water and a form of energy (4 letters)
  6. 9. Free flowing movement of air (4 letters)