Chapter 7 Vocabulary

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Across
  1. 2. a layer of solid rock that surrounds the Earth's surface
  2. 4. the thick layer that surrounds the core and is made up of hot but mostly solid material
  3. 6. plate thick plates made of andesite and granite that form the continents and are less dense than oceanic plates
  4. 7. tectonic plates Juan de Fuco Plate, Nazca Plate, Philippine Plate, Caribbean Plate, Scotia Plate, Arabian Plate, and Cocos Plate
  5. 9. topmost layer of the Earth made up of the crust and the solid portion of the upper mantle
  6. 12. the supercontinent
  7. 14. of plate tectonics scientific theory explaining how the plates move on the Earth's surface
  8. 15. plate occurs when two plates move towards each other and collide
  9. 16. plate occurs when two plates move away from each other
Down
  1. 1. plate thin plates that are made of basalt that form the ocean floor and are denser than continental plates
  2. 3. plates Earth's surface is broken into large pieces that move over the asthenosphere
  3. 5. where the plates of the lithosphere float, or slide a top, a thin, semi-solid layer in the upper mantle
  4. 8. plate occurs when two plates slide past each other
  5. 10. tectonic plates Eurasian Plate, North American Plate, South American Plate, Pacific Plate, African Plate, Australian Plate, Antarctic Plate, and Indian Plate
  6. 11. core liquid metal that surrounds the inner core
  7. 13. currents caused by the very hot material at the deepest part of the mantle rising, then cooling, sinking again, and then heating, rising, and repeating the cycle over and over
  8. 17. core a sphere of hot, solid metal