Plate Tectonics CW 2

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Across
  1. 3. A scientist who studies earthquakes.
  2. 7. this layer is formed with the crust and rigid upper mantle, and is above the asthenosphere
  3. 8. All the oceans, rivers, lakes and water on Earth. It comes from the word “Hydro” which means “water.”
  4. 9. When two tectonic plates slowly crash into each other and mountains are formed.
  5. 11. a theory that proposes that magma under Earth’s crust is forced up toward the surface at the mid-ocean ridges, forming new seafloor
  6. 14. the process of moving things from one place to another.
  7. 15. When one tectonic plate converges under another due to density differences.
  8. 17. the layer below the lithosphere and is plasticlike
  9. 18. A boundary of two tectonic plates where the plates slide past each other.
  10. 21. A boundary of two tectonic plates where the plates move away from each other.
  11. 22. A solid form of carbon dioxide that is very cold and turns directly from a solid to a gas.
  12. 23. A boundary of two tectonic plates where the plates move towards each other.
  13. 24. The outer most layer of the Earth. This is the layer we walk on.
  14. 25. Slowly moving pieces of Earth’s crust.
  15. 26. To reuse something that would have otherwise been thrown out or to turn it into something usable again instead of sending it to a landfill.
  16. 27. Movement caused by warm fluids rising and cooler fluids sinking.
Down
  1. 1. melted rock
  2. 2. a chain of ridges and valleys stretching along Earth’s ocean floor
  3. 4. All the living things on Earth. It comes from the word “Bio” which means “life.”
  4. 5. All the rock, soil and sediments that makeup Earth’s land. It comes from the word “Geo” which means “Earth.”
  5. 6. large, slow moving bodies of ice on land
  6. 10. a single landmass composed of all the continents joined together
  7. 12. All the gases surrounding the earth. It comes from the word “Atmos” which means “air.”
  8. 13. Wegener’s hypothesis that all continents were once connected in a large landmass that broke apart & drifted slowly to their current positions
  9. 16. pull-apart forces
  10. 19. large sections of Earth’s crust and upper mantle
  11. 20. a cycle of heating, rising, cooling and sinking