Cumulus
A) can occasionally produce rain, if the clouds are taller than they are wide.
B) is common in winter.
C) is uncommon in summer.
D) is found at middle altitudes.
E) usually signals an approaching warm front.
A
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Hypoxic areas such as in the Gulf of Mexico develop when ________.
A. die-off from a large phytoplankton bloom uses up the oxygen in water B. oxygen levels fall below 5 ppm C. oxygen levels fall below 5 ppm, large amounts of nitrate are added into the water, and die-off from a large phytoplankton bloom uses up the oxygen in water D. methyl-mercury is added to water E. large amounts of nitrate are added into the water
In which stage of the Demographic Transition are birthrate and death rate both high?
A) stage 1 B) stage 2 C) stage 3 D) stage 4 E) stages 1 and 4
A ________, seen in the contemporary North American rural landscape, is characterized by farmers living on individual farms isolated from neighbors, rather than alongside other farmers in settlements
A) clustered rural settlement
B) dispersed rural settlement
C) clustered linear rural settlement
D) clustered circular rural settlement
E) main street settlement
The energy content and biomass of ________ is lowest in a terrestrial food web
A) producers B) primary consumers C) top carnivores D) small carnivores such as spiders and lizards E) detritivores and decomposers