Restless Earth

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Across
  1. 2. the outer layer of the Earth
  2. 6. number of major plates
  3. 7. made up of the crust and upper part of the mantle
  4. 8. there is an inner and outer one of these
Down
  1. 1. two plates slide past each other
  2. 3. two plates slide towards each other
  3. 4. contains semi-molten magma
  4. 5. two plates move away from each other