Plate Tectonics

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Across
  1. 5. Solid rock layer.
  2. 9. A electronic machine that records seismic waves.
  3. 10. a long narrow depression on the bottom of the ocean.
  4. 11. A long chain of volcanoes.
  5. 13. A word that describes past periods of extensive glaciations.
  6. 14. molten layer of the upper mantle.
  7. 18. Energy wave that transfer into space.
Down
  1. 1. A release of energy in the earth;s crust.
  2. 2. Earth's thickest layer.
  3. 3. somewhere inside the earth where the earthquake starts.
  4. 4. The focus where the earthquake starts.
  5. 6. A break or Fracture in a rock layers.
  6. 7. measurement of the average kinetic energy.
  7. 8. An opening in the earth's surface that can spew melted rocks and gases.
  8. 9. Land that is made up of more than one continent.
  9. 12. Crust and upper potion of the earth's mantle.
  10. 13. Ground that is usually frozen from year to year.
  11. 15. Tectonic plates that are pushing under another tectonic plate.
  12. 16. Below earth's mantle which contains nickel and iron.
  13. 17. An amount of Force in an area.