Unit 7a: Earth's Spheres

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Across
  1. 2. the first layer of the atmosphere in which most weather phenomena occur
  2. 6. all of the rocks, minerals, and ground found in and on Earth
  3. 7. all parts of and around the Earth where life can be found
  4. 8. the process of water circulating throughout the Earth by evaporation, condensation, precipitation, and transpiration of plants
  5. 9. the whole mass of air that surrounds the Earth
  6. 11. warming of Earth’s surface and the air above it caused by gases that trap heat
  7. 13. the weight of air molecules pressing down on the Earth
Down
  1. 1. the fourth and hottest layer of Earth’s atmosphere; auroras are found here
  2. 3. the last and thinnest layer of Earth’s atmosphere; the beginning of outer space
  3. 4. total amount of water on Earth – can be liquid, vapor, or ice
  4. 5. the second layer of Earth’s atmosphere in which the ozone layer is located
  5. 10. the middle and coldest layer of Earth’s atmosphere; meteors burn up in this layer
  6. 12. part of the Earth’s surface where water is in solid form