The Earth's Outermost Rigid Rock Layer the ___ Is Composed

question 25

Multiple Choice

The Earth's outermost rigid rock layer the ___ is composed of plates that float on the ___, the region of the mantle where rocks become hot and soft.

• A)upper mantle…inner core
• B)asthenosphere…lower mantle
• C)plate boundary…lithosphere
• D)lithosphere…asthenosphere

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