Geography Landforms term

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Across
  1. 4. ______plate boundaries where plates move toward one another and collide
  2. 6. _______Lines are wavy, brown lines on a topographic map representing height
  3. 9. ________plate boundaries beneath the ocean where tectonic plates move away from each other
  4. 10. wearing away of Earth's surface by wind, water or glacial action
  5. 12. a flat rocky region created by land worn down to ancient rock
  6. 15. a huge, slow-moving river of ice
  7. 16. earth.
  8. 18. a broad, predominantly flat land area
  9. 19. ______ tectonics is a theory that the earth's crust is made up of rigid plates that are pushed by forces
  10. 21. _______ plate tectonic plate under land
  11. 22. a long low area often running between hills or mountains
  12. 23. the breaking down of rocks by physical or chemical processes
Down
  1. 1. soft layer of semi-molten rock under the lithosphere
  2. 2. landform created when oceanic plate goes under continental plate
  3. 3. a large landform that rises steeply above the surrounding terrain
  4. 5. U-shaped valley filled with water with steep cliffs created by glacier
  5. 7. ________ plate tectonic plate under ocean or sea
  6. 8. ________plate boundaries that are sliding past each other.
  7. 11. distance above sea level
  8. 13. 2D map that shows the 3D shape of the land
  9. 14. level average height of the ocean's surface, zero elevation
  10. 17. hard outer layer of Earth made up of moving plates
  11. 18. a large, flat area of high land rising above the surrounding land
  12. 20. the natural features that make up the Earth's surface