plate tectonics

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Across
  1. 1. a thin lyaer of cool rock that ros on the earth's outer skin both on dry land and in the ocean
  2. 5. a crust and upper mantle
  3. 6. caused by the very hot mantle at the deepest part of the mantle
  4. 8. largest layer of hot rock
  5. 9. solid because of the pressure of nickel and iron
Down
  1. 1. crust made of granite 25 miles thick, brittle and not dense
  2. 2. so hot that the metals are all liquid
  3. 3. consists of rock and minerals on the earth's surface and below it
  4. 4. semi rigid part of the middle mantle that flows like hot asphalt under a heavy weight
  5. 5. a large fraction of the Earth's interior, from a depth about 400 miles to about 1800 miles.
  6. 7. crust made of basalt 3-5 miles thick