Earth

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Across
  1. 2. overflowing of large amounts of water on the land
  2. 4. instrument that measures motion of the ground
  3. 5. a process that occurs at mid-ocean ridges
  4. 8. thickest layer of the earth
  5. 9. a super continent
  6. 10. hottest part of the planet
  7. 11. a theory that the Earth's outer shell is divided into plates
Down
  1. 1. region made up of crust and upper mantle
  2. 3. movement of the earth's surface
  3. 6. sudden shaking of the ground
  4. 7. composes of iron and nickel
  5. 12. outermost layer of the earth