Science Vocab

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Across
  1. 7. ridge: a plate boundary in the ocean
  2. 8. plates: 7 large pieces of rock
  3. 9. A rigid layer of rock
  4. 11. drift: Alfred Wegener, puzzle piece continents, rock structures, fossils, climate
  5. 13. made of oxygen, silicon, iron, 5-40 km thick, solid
  6. 15. core: made of iron and nickel, 1200 km thick, solid
Down
  1. 1. boundaries: 2 plates moving away from each other
  2. 2. mass per unit of volume
  3. 3. The ocean floor sinks beneath the crust
  4. 4. core: made of iron and nickel, 2250 km thick, liquid
  5. 5. spot: am area in the mantle that can cause a chain of volcanic islands to form
  6. 6. made of oxygen, silicon, iron, magnesium, 2900 km thick, solid and plasticity
  7. 10. super continent, before the continents were separate
  8. 12. boundaries: 2 plates grind against each other
  9. 14. Valley: 2 continents moving away from each other