The layers of the earth

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Across
  1. 5. responsible for driving plate tectonics motion
  2. 6. The thinnest layer of the earth
  3. 7. The most hottest layer
  4. 8. is constantly being destroyed
Down
  1. 1. lies above sea level
  2. 2. The largest layer of the earth
  3. 3. The liquid layer of the earth
  4. 4. The crust that protects the earth