g7 3.3 and 3.4

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Across
  1. 3. Where old crust sinks
  2. 4. happens as molten rock from Earth's mantle forces its way through divergent boundary openings in the oceanic crust.
  3. 6. Before the continental drift
  4. 7. The large, thick pieces the earth is broken up into
  5. 8. where tectonic plates move apart
Down
  1. 1. made up of Earth’s crust and the uppermost part of the mantle.
  2. 2. The shallow layer of mantle just below the Lithosphere
  3. 5. Seafloor spreading creates...