When water enters a crack in a rock and subsequently freezes, it has the effect of ___
a) gluing the rock more tightly together
b) making the rock harder
c) sealing the crack thereby preventing further weathering
d) widening the crack and hastening the rock's disintegration
e) displacing surface acids that may weaken the rock
Ans: d) widening the crack and hastening the rock's disintegration
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Radar gathers information about precipitation in clouds by measuring the ____
A) energy emitted by the precipitation particles B) absorption characteristics of falling precipitation C) amount of energy reflected back to a transmitter D) amount of sunlight scattered off the precipitation
What is the primary cause of nature deficit disorder?
A. too much poverty B. too much affluence C. increased isolation from the natural world D. poor sanitation E. increased pollution
In 2012, the world human population surpassed
A) 1 billion. B) 3 billion. C) 4 billion. D) 6 billion. E) 7 billion.
The observation that one subtropical boundary current is faster, narrower, and deeper than its counterparts is an example of which of the following?
A) Eastern intensification B) Ekman transport C) Equatorial upwelling D) Geostrophic current E) Western intensification