Journey to the Center of the Earth crossword puzzle

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Across
  1. 3. A rock that makes up much of the ocean floor.
  2. 5. core: Innermost region of the earth.
  3. 10. Where the edges of the plates meet.
  4. 11. The transfer of heat by the movement of a heated fluid.
  5. 12. Soft layer of rock in the mantle.
  6. 15. Layer of crust and upper part of mantle.
  7. 17. crust: Type of crust that make up the continents.
  8. 20. outermost layer of Earth.
Down
  1. 1. core: Layer of Eart made of iron and nickel that is liquid.
  2. 2. The transfer of energy through empty space.
  3. 4. boundary: type of boundary where plates are moving apart.
  4. 6. wave: A wave produced by an earthquake.
  5. 7. Large landmass occurring about 250 million years ago.
  6. 8. zone: Area where one plate sinks below another.
  7. 9. Fossilized fern.
  8. 13. crust: Type of crust found under the oceans.
  9. 14. tectonics: Scientific theory that says that plates are in slow constant motion.
  10. 16. waves: This type of wave does not pass through liquid.
  11. 18. Wegener: German scientist who came up with continental drift idea.
  12. 19. Valley: A deep valley on land that forms along a divergent boundary.