The rigid crust and uppermost mantle are known collectively as the
A) asthenosphere.
B) lithosphere.
C) Moho.
D) Gutenberg discontinuity.
B
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One way to maintain soil fertility is through ____.
A. soil salinization B. waterlogging C. slash-and-burn agriculture D. soil conservation E. aquaculture
The best way to limit the impact of invasive species is to ____.
A. use pesticides to reduce their numbers B. import and release their natural predators C. prevent them from being introduced in the first place D. hire lots of people and destroy them E. alter their genes so they all die
Which of the following energy sources is not renewable?
A. nuclear fission power B. solar energy C. wind energy D. hydropower
The point on Earth's surface directly above the point where the fault first ruptures is called the ________.
A. hypocenter B. depocenter C. ethnocenter D. epicenter