Plate Tectonics

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Across
  1. 2. The layer of rock that forms Earth’s outer layer.
  2. 6. The study of planet Earth
  3. 7. The material that forms Earth’s hard surface.
Down
  1. 1. The layer of hot; solid material between the crust and core.
  2. 3. A deep valley that forms where two plates move apart.
  3. 4. A trace of an ancient organism that has been preserved in rock.
  4. 5. A dense sphere of solid iron and nickel in the center of Earth.