If you were on an oceanographic cruise from San Diego toward Hawaii and you sampled benthic organisms at stations along the track, what distribution of benthic life would you find?
a) mostly the same amount all along the track
b) low in numbers at first, but increasing over the ocean toward Hawaii
c) high in numbers at first, but decreasing over the ocean toward Hawaii
d) high in numbers at the beginning and varying throughout the journey
e) variable with patches of high and low abundance here and there
C
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A mountaintop is made of limestone overlying a layer of basalt. What would be the origin of this mountain?
A) The limestone would have formed by sediment in a river valley where the river was flowing over basalt. B) The limestone would have formed by volcanic outflow and the basalt would have been part of the volcano. C) The limestone would have formed at the bottom of an ocean and the basalt would have been part of the oceanic crust. D) The basalt would have formed under metamorphosis by the pressure of the limestone that formed by sedimentation on top of it.
When you drop an object, it accelerates downward at a rate of 10 m/s2. If you instead throw it downward, its acceleration (after leaving your hand and with no air resistance) will be
A. exactly zero. B. 10 m/s2. C. less than 10 m/s2. D. greater than 10 m/s2.
The key special chemical used by chemosynthetic communities at hot vents is ________.
A. silicate B. nitrate C. phosphate D. methane E. hydrogen sulfide
You are gathering information for a severe weather forecast and you need to know the temperature and relative humidity of the air all the way up to the tropopause. The instrument you need to employ is:
A) a weather balloon with radiosonde. B) a weather radar. C) an aircraft. D) a satellite.