marlee chapter 7

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Across
  1. 3. was a supercontinent that existed during the late Paleozoic and early Mesozoic
  2. 6. drift the gradual movement of the continents across the earth's surface through geological time.
  3. 7. proposed driving force for plate motion in plate tectonics that occurs at mid-ocean ridges
Down
  1. 1. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder
  2. 2. he sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
  3. 4. tectonics a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
  4. 5. proposed driving force for plate motion in plate tectonics that occurs at mid-ocean ridges