?

123456789101112
Across
  1. 2. changes through time
  2. 6. protection from cold weather
  3. 8. planets do this
  4. 9. causes eathquakes
  5. 10. circulation of water
  6. 12. outer layer of the earth
Down
  1. 1. made of planets
  2. 3. humans
  3. 4. Scientific word for Land
  4. 5. makes you heavier
  5. 7. when water is boiled to a certain heat it ...
  6. 11. everything has these