EARTH SCIENCE CROSSWORD

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Across
  1. 2. rock formed under great heat and pressure within Earth's crust
  2. 5. time when extensive ice fields covered the polar regions
  3. 6. crack in the Earth's crust
  4. 7. elevation differences between different areas
  5. 8. Region of the earth between the crust and the core
  6. 9. hot central part of the Earth below the mantle
  7. 10. outer layer of the earth
  8. 15. hypothetical landmass that existed when all continents were joined
  9. 16. shaking of the ground caused by sudden movement of the earth's crust
  10. 18. hot fluid rock erupted from a volcano
  11. 19. remnant or trace of a prehistoric organism
  12. 20. arrangement of physical features of an area
  13. 21. gradual loss of surface soil
Down
  1. 1. slowly moving mass of ice formed over many years
  2. 3. layers of the Earth's crust that travel independently over the mantle
  3. 4. rock formed by the cooling and solidification of lava
  4. 11. long narrow hilltop or mountain range
  5. 12. large underground chamber
  6. 13. hot fluid rock below the Earth's crust
  7. 14. mass of sediment deposited at the mouth of a river
  8. 17. loss of snow or ice from a glacier