In tropical regions the surface temperature of the oceans is high but decreases rapidly with depth between 300 and 1000 meters because ________
A) rapidly upwelling cold currents occur in these regions
B) tropical regions are areas of high rainfall and this rapidly lowers the temperature of seawater
C) sunlight cannot penetrate much below the surface of the oceans
D) cold water from the polar regions flows just below the surface
E) volcanic activity on the seafloor is rare in the tropics
C
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Which of the following best describes the condition of steady-state equilibrium?
A) System inputs always exactly balance outputs so the system never changes. B) System inputs and outputs fluctuate around a stable average so the system does not move far from its average condition. C) System inputs produce large, random fluctuations in output, forcing the system into a new state of equilibrium. D) Systems slowly adjust to long-term changes in input and output.
When "the big one" hits Southern California, Los Angeles is likely to slip into the ocean. Indicate whether the statement is true or false
Because sea level does not act like base level with glaciers, a glacier can erode its bed below sea level
Indicate whether this statement is true or false.
Which of the following surfaces has the lowest albedo?
A) A – fresh snow
B) B – forests
C) C – orchards
D) D – water with a small zenith