Science

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Across
  1. 2. Molten rock visible on Earth.
  2. 4. A major tectonic plate.
  3. 7. The outer layer of the Earth.
  4. 10. Broken piece of lithosphere.
  5. 13. The current era in the history of Earth.
  6. 14. Currents that occur below the Earth's surface.
  7. 16. The state of liquified rock.
  8. 18. Type of rock that contains fossils.
  9. 20. A major tectonic plate.
  10. 21. The first vertebrates on Earth.
Down
  1. 1. The state rock that flows like plastic putty.
  2. 3. The layer below the crust.
  3. 5. Evidence of a plant or animal that lived long ago.
  4. 6. The middle of the Earth.
  5. 8. Earth's crust and upper mantle layer.
  6. 9. This type of fossil tells the age of a rock layer.
  7. 10. The plates move __.5 cm each year.
  8. 11. The scientist who believed Pangaea existed.
  9. 12. A marine animal that has existed since 4.6 bya.
  10. 15. Different layers of rock and sediment.
  11. 17. An animal fossil found on several continents
  12. 19. The name of the supercontinent.