An effusive eruption ________, whereas an explosive eruption ________.
A) results from magma produced by subducting oceanic plates; originate in the asthenosphere and upper mantle
B) produces composite volcanoes; is an outpouring of low-viscosity magma onto the ground
C) is a violent eruption of magma, gas, and pyroclastics; produces shield volcanoes
D) is an outpouring of low-viscosity magma onto the ground; is a violent eruption of magma, gas, and pyroclastics
E) produces composite volcanoes; produces shield volcanoes
Question 2
An estimated ________ percent of the Earth's precipitation occurs over land.
A) 22 B) 86 C) 14 D) 8 E) 78
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