Earth Science Crossword

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Across
  1. 1. forces pushing against each other
  2. 3. hard outer layer of the earth
  3. 4. when two plates pull apart
  4. 6. rock with an opening to the mantle
  5. 9. a long depression with steep walls
  6. 11. a way to find distance by sending sound waves and checking how long it takes for them to bounce back
  7. 12. an area where plates go into the mantle
  8. 13. the supercontinent that was made up of all the continents
  9. 16. when two plates push together
  10. 19. a fault where the block above the fault moves and over the block below
  11. 20. the man that figured out seafloor spreading
Down
  1. 2. solid metal, deepest part of the earth
  2. 5. forces pulling against each other
  3. 7. solid rock layer of the earth, has convection currents
  4. 8. the border between two tectonic plates
  5. 10. remains of dead animals
  6. 14. a fault where the block above the fault move downward compared to the block below
  7. 15. when two blocks slide past each another
  8. 17. liquid metal, is a casing for a layer of the earth
  9. 18. when two plates scrape by each other