The average Earth density is ________ the mantle density
A) unrelated to
B) equal to
C) less than
D) greater than
Answer: D
Environmental & Atmospheric Sciences
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A long, narrow, sinuous ridge of stratified sand and gravel located in a till plain is known as a(n)
A) drumlin. B) kame. C) esker. D) kettle.
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How often during a year is the sun directly overhead at Mexico City (latitude 19°N)?
A. twice B. never C. four times D. once
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Convection currents in the air near a seashore are produced by
A. unequal heating of land and water. B. varying temperatures. C. shifting winds. D. none of the above
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A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. If the period of stretch is 2 s, the magnitude of the jumper's average deceleration is about
A) 0.5g. B) g. C) 1.5g. D) 2g. E) none of the above
Environmental & Atmospheric Sciences