Earth's major layers include (from outermost to innermost) :
A) inner core,outer core,mantle,crust.
B) outer core,inner core,mantle,crust.
C) crust,mantle,outer core,inner core.
D) crust,outer core,inner core,mantle.
Correct Answer:
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Q20: Solar energy energizes all of the following
Q21: The plate tectonic system is driven by
A)magnetism.
B)the
Q22: Elevation of the ground surface is measured
Q23: The three major global geosystems are
A)climate system,solar
Q24: What caused the mass extinctions 65 million
Q26: Continental crust is _ oceanic crust.
A)less dense
Q27: When did biology's Big Bang (evolutionary explosion)occur?
A)approximately
Q28: The Mohorovičić discontinuity coincides with the _
Q29: Earth's atmosphere has been oxygen-rich for _
Q30: The first evidence of erosion by water
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