Weathering/Erosion/Plate Tectonics

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Across
  1. 1. These drive plate movement, caused by the heating and cooling of earth's interior
  2. 5. This type of weathering occurs when a rock is broken down by physical means
  3. 7. This boundary is caused by two plated moving towards eachother
  4. 9. Weathering by living things
  5. 11. This layer of the earth is what tectonic plates sit on top of
  6. 16. This type of weathering occurs when a chemical reaction takes place
  7. 17. The dropping off of sediment
  8. 18. This weathering occurs when carbon dioxide builds up in the atmosphere
  9. 20. This type of weather occurs when water frezes in the cracks of rocks
  10. 21. The movement of sediment
  11. 22. The breaking down of rocks
Down
  1. 2. This boundary is caused when one plate goes underneath another
  2. 3. This boundary is caused by two plates sliding past one another
  3. 4. The most recent supercontinent
  4. 6. The point of orgin for a earthquake
  5. 8. The breaking down of rocks by wind, water, or gravity (think sandpaper)
  6. 10. A type of weathering that occurs when a living thing creates an ____________ acid
  7. 12. A chemical reaction between a substance and water. This causes the substance to break down
  8. 13. The reaction between oxygen and a metal, also called rusting
  9. 14. Where an earthquake occured on the crust
  10. 15. This boundary is is what caused the mid-ocean ridge
  11. 19. __________-spreading occurs at the midocean ridge, this creates new ocean crust
  12. 22. The scientist who proposed the idea of continental drift