Geology Review II

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Across
  1. 2. unevenly heats the asthenosphere
  2. 4. the denser of the crusts that covers tectonic plates
  3. 6. subduction movement
  4. 7. divergent boundaries slide past each other and can do this
  5. 8. tectonic plate are large pieces or these
Down
  1. 1. includes frozen water at the polar ice caps
  2. 3. the layer of Earth composed of magma
  3. 5. crust that covers tectonic plates, less dense than its friend