Active Earth

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Across
  1. 3. A place where two tectonic plates push towards each other
  2. 5. The rigid outer layer of Earth; crust and upper mantle
  3. 6. The movement of continents across Earth's surface
  4. 7. A scientist who studies Earth
  5. 9. A border between two neighboring plates
  6. 11. Valley a long indent/vallet formed when a continent pulls aart
  7. 15. Any rock formed by the cooling of magma and lava
  8. 16. A single large landmass made of smaller continents
  9. 17. A place where two tectonic plates slide past eachother
  10. 20. A method to determine if one rock layer is older than another
Down
  1. 1. rock Any rock that formed from a pre-existing rock
  2. 2. Gluing together of sediments by new mineral crystals
  3. 4. squeezing together of sediment by overlying layers
  4. 8. rock The original rock from which a metamorphic rock is formed
  5. 10. Wearing away and removal of rock
  6. 12. a crack where two slabs of rock move past each other
  7. 13. Forms as a crystal like structure and is the building block of rocks
  8. 14. The outer most layer of Earth
  9. 18. Boundary A place where two tectonic plates move away from each other
  10. 19. Small broken pieces of rocks