Gen Sci mod 6

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Across
  1. 3. The study of Earth and earth forming processes
  2. 5. The crust and upper part of the mantle.
  3. 9. The place where seismic waves suddenly slow down between the crust and upper mantle.
  4. 10. The idea that the Earth is millions of years old.
Down
  1. 1. The belief that earth forming processes have always been as slow as we observe today
  2. 2. The theory that all the continents where once connected and have drifted apart over time.
  3. 4. Believed to have both liquid and solid portions, at the center of the Earth.
  4. 6. Sound waves that you can feel but can't hear
  5. 7. Makes up 84% of the Earth's mass.
  6. 8. The surface of the Earth we stand on.