8th Grade Earth Science Crossword Puzzle

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Across
  1. 2. A mountain or hill out of which comes lava and hot gases.
  2. 4. An underwater mountain range that forms at a plate boundary where two ocean plates are pulling apart.
  3. 6. The surface of the earth is broken up into these, and they move.
  4. 8. The idea that continents were once connected and have moved over time.
  5. 9. A supercontinent that included all current land masses, believed to have been in existence before the continents broke apart.
  6. 10. When one plate slides below another plate.
  7. 12. This is the reason why the plates move.
  8. 13. The idea that new rock is formed at the mid ocean ridge and the sea floor is moving.
  9. 14. An area of the earths mantle that is hotter than other area. It is responsible for creating volcanic island chains.
  10. 15. The place in the earth where convection currents occur.
  11. 16. A sudden and violent shaking of the ground.
Down
  1. 1. A plate boundary where two plates move into each other.
  2. 3. A long, narrow, steep-sided depression on the ocean floor.
  3. 5. A type of rock formed deep in the earth under pressure and heat; it provides evidence that the rock of the mantle is semi-fluid like silly putty.
  4. 7. A denser type of crust that makes up the ocean floor.
  5. 11. A type of plate boundary where two plates slide past each other.