Earth Lesson 4

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Across
  1. 3. the liquid water found on Earth
  2. 4. where life exists
  3. 7. the fourth layer of the atmosphere
  4. 8. the second layer of the Earth
  5. 9. the third layer of the Earth
Down
  1. 1. the outermost layer of the atmosphere
  2. 2. first layer of the atmosphere
  3. 3. a region of space that is the right distance from the sun to allow for life
  4. 5. the most outer part of the Earth
  5. 6. the third planet in the solar system