Science Vocabulary

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Across
  1. 1. Ocean Ridge A line of underwater mountains in the middle of the ocean.
  2. 2. A crack in the lithosphere
  3. 6. The measure of an earthquake’s strength.
  4. 7. Spot A region of volcanic activity in the middle of a plate.
  5. 9. Drift Wegener’s theory that a supercontinent split apart and the pieces drifted to their present location.
  6. 11. A shaking of the ground.
  7. 13. tectonics Earth’s surface is made of plates that move slowly across the mantle.
  8. 15. Molten rock in the mantle.
  9. 17. magma on the Earth’s surface.
  10. 19. The point on Earth's Surface just above the focus.
  11. 20. one plate sinking beneath another.
Down
  1. 1. amount of energy released in an earthquake.
  2. 3. Andreas Fault The boundary between the north American and pacific plates.
  3. 4. Wave A vibration that travels through Earth.
  4. 5. Scale A way to measure the magnitude of an earthquake.
  5. 8. Trench A long, deep undersea valley.
  6. 10. Scale A way to measure the intensity of an earthquake.
  7. 12. Cycle The process by which one kind of rock is changed into another.
  8. 14. rocks in the rust attached to the upper mantle.
  9. 16. the point below Earth's surface where an earthquake occurred.
  10. 18. A crack in the crust through which magma flows.