Review on Reading PT 11 Part 2
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The hard, rigid .......... that form the outermost portion of the earth are about 100 kilometers thick.
plates
The rocks of the .......... (mantle / crust / surface / layer) are composed mostly of minerals with light elements.
crust
The crust and upper mantle that form the surface plates are called the .......... (raft / asthenosphere / lithosphere / currents)
lithosphere
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