Bitumen is
A. a type of coal.
B. a deep shale oil deposit.
C. a heavy oil with a high sulfur content.
D. an octane-raising gasoline additive.
E. a type of natural gas.
Answer: C
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The most likely conditions under which mud cracks form are:
a) High mountains with very cold winters and moderate summers b) Deep ocean c) Climate like we see in Antarctica today d) Swampy and boggy with lots of rain e) Some environment where mud can periodically get wet and dries out again
Effective use of the urban-structure models depends on the availability of data at the scale of:
A) national and state level B) state and municipal level C) municipal and city level D) individual neighborhood level E) all of the above
Why are oceanic ridges elevated above the rest of the seafloor?
What will be an ideal response?
Which of the following is true of thermohaline circulation?
A) They are deep currents caused by differences in temperature and salinity. B) The circulation has a definitive beginning and end, at the equator and poles, respectively. C) Due to t heir depths, they carry limited volumes of water. D) They travel at greater speeds than surface currents. E) They are largely wind driven.