Inside of the Earth!

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Across
  1. 3. Thinnest layer of Earth
  2. 5. S-Waves move in this direction
  3. 6. These waves travel through solid layers of the Earth only
  4. 7. This type of crust makes up all water on Earth's surface
  5. 8. These waves are produced from earthquakes
  6. 10. This type of crust makes up all land on Earth's surface
  7. 11. This station detects where an earthquake is coming from
  8. 13. Made of liquid iron and nickel
  9. 14. This changes as waves go from the solid inner core to the liquid outer core
  10. 16. Thickest layer of Earth
  11. 17. The point where an earthquake originates in the crust
  12. 18. This region is a combination of Earth's crust and upper mantle
Down
  1. 1. These waves travel through solid and liquid layers of the Earth
  2. 2. This is located in the upper mantle
  3. 4. What happens to waves when they change mediums
  4. 9. Made of solid iron and nickel
  5. 11. This zone is an area with no seismic activity
  6. 12. P-Waves move in this direction
  7. 15. This is calculated by dividing distance over average travel time