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Across
  1. 4. Supercontinent that contained all the continents in one landmass
  2. 5. The circulatory motion that occurs in a fluid at a nonuniform temperature owing to the variation of its density and the action of gravity
  3. 7. Region where two plates slide horizontally past each other
  4. 8. Region where two tectonic plates are moving apart
Down
  1. 1. Huge piece of crust and rigid upper mantle that fits together with other plates at their edges to cover Earth’s surface
  2. 2. Process where two plates collide and the denser plate descends below the other, less-dense plate
  3. 3. event that happens when the flow in the outer core changes, and Earth’s magnetic field changes direction
  4. 6. Region where two tectonic plates are moving toward each other