Science Vocab

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