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10 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
The Earth's outer shell is called the ______.
crust
The crust and the topmost layer of the mantle form the ______.
lithosphere
None
The Earth's crust is divided into large pieces called ______ plates.
continental
The theory of ______ ______ explains how the continental plates move and what happens at their boundaries.
plate tectonics
If two continental plates move apart, ______ or molten rock, comes up, cools, and forms new rock.
magma
If two continental plates collide, either both will rise up or one may be ______ underneath the other.
pushed
Continental plates can also slide ______ against one another.
sideways
If you look at a world map, the continents look as if they could fit together like a ______.
puzzle
Most scientists think the continents were once one massive land formation called ______.
pangaea
Is the Atlantic Ocean getting wider or narrower?
wider