The smallest marine mammal is a ________.

A. dugong
B. sea lion
C. fur seal
D. sea otter
E. seal


Answer: D

Environmental & Atmospheric Sciences

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What fraction of Earth's fresh water is held in the Great Lakes?

A) 1/20 B) 1/10 C) 1/5 D) 1/2

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The sun gets its energy from a nuclear reaction where hydrogen atoms _____ to form helium atoms. That means that atoms themselves contain ______ energy.

Fill in the blank(s) with the appropriate word(s).

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Briefly explain why a region that is tectonically active may be particularly vulnerable to mass wasting

Environmental & Atmospheric Sciences

Which of the following primary energy sources is currently most consumed by humans?

A) coal B) oil C) natural gas D) nuclear power E) wood

Environmental & Atmospheric Sciences