A nerve gas such as sarin does which of the following?
A) causes a decrease in acetylcholine
B) irreversibly inhibits acetylcholinesterase
C) reversibly inhibits acetylcholinesterase
D) reacts directly with acetylcholine
B
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Earth's radiation is often referred to as ____ radiation, while the sun's radiation is often referred to as ____ radiation
A) shortwave; longwave B) shortwave; shortwave C) longwave; shortwave D) longwave; longwave
Which arrows in this figure indicates ultraviolet energy, an external energy source? 
A. A B. B C. C D. D
The use of what energy resource is a major contributor to acid rain?
A) coal B) geothermal power C) hydropower D) natural gas E) nuclear power
Volcanic venting of substances including water vapor is called ____
A) ?outgassing B) ?fissure C) ?fusion D) ?condensation