How does the asthenosphere differ from the lithosphere?
A) The asthenosphere is the outermost layer made of solid rock while the lithosphere is the innermost layer made of molten rock.
B) The asthenosphere is the innermost layer made of molten rock while the lithosphere is the outermost layer made of solid rock.
C) The asthenosphere is at the core of the earth and the lithosphere surrounds it.
D) The hundred-kilometer plates of the lithosphere rest upon the weaker and less rigid rock of the asthenosphere.
Question 2
Where does most mountain-building activity actually occur on Earth?
A) in the inner mantle, where force causes pressure to build up
B) mountain pressures that build up end up forming mountains in the middle of the tectonic plates
C) at tectonic plate boundaries
D) anywhere on Earth where the necessary forces are evident
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