Peroxyacetyl nitrates (PANs) in the lower troposphere
A) are principally related to sulfur dioxides.
B) are formed by particulates such as dust, dirt, soot, and ash.
C) damages and kills plant tissue but does not appear to affect people.
D) are emitted from the tail pipes of automobiles; i.e., it comes directly from automobile exhaust.
C
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Zooplankton populations in Lake Erie and the Hudson River have declined by up to 70% since the arrival of zebra mussels because ________
A) waste from zebra mussels promotes bacterial growth that kills zooplankton B) zebra mussels carry a parasite that kills zooplankton C) zebra mussels feed on phytoplankton, which zooplankton need as a food source D) zebra mussels prey exclusively on zooplankton E) zebra mussels block sunlight penetration into lakes and thus prevent zooplankton from photosynthesizing
Just after the body dies, it immediately stops taking in needed oxygen. Does it at the same time immediately stop producing carbon dioxide?
A) Yes, because without the oxygen, carbon dioxide can no longer be produced. B) Yes, because death means an immediate cessation of all body metabolism. C) No, and without CO2 exhalation the pH of the blood decreases to very damaging levels. D) No, and without CO2 exhalation the pH of the blood increases to very damaging levels.
Why does the heat budget vary with latitude?
A) The angle of the sun at varying latitudes B) The proximity to magnetic poles C) Atmospheric circulation currents disperse solar radiation D) The axis of the Earth
A tsunami is ________
A) a common occurrence in the central United States B) a cataclysmic strike of a meteorite C) another term for a seismic sea wave D) unknown in islands like Hawaii E) the glowing blast of an exploded volcano