What could ultimately be linked to the lack of water on Mars?
a. The large decrease in carbon dioxide.
b. The proximity to the sun.
c. The lack of free oxygen in the atmosphere.
d. The lack of outgassing from the interior of the planet
ANS: A
The large decrease in carbon dioxide could explain why there is currently no water found on Mars.
Carbon dioxide is a greenhouse gas which can insulate a planet. As the carbon dioxide began to be
absorbed by rocks, the atmosphere became thin. This made the surface very cold. The ocean
disappeared because the water either bound to rocks or froze beneath the surface. Information can be
found in the section Are There Other Ocean Worlds
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The greatest contrast in both temperature and moisture occurs along the boundary between which of the following air masses?
A. cA and mT B. cP and cT C. mP and mT D. cP and mT
What is bycatch?
a. The unintentional killing of organisms during harvesting of a desirable species b. The number of organisms caught in a trawl c. The number of organisms that can be harvested without impairing future generations d. The targeted organisms for a harvest e. The quota of organisms allowed in a catch
If all of the grains in a sedimentary rock are about the same size, shape, and composition, the rock can
be characterized as: a. cemented. b. compacted. c. cross-bedded. d. graded. e. well sorted.
Sediments found on the seafloor and attributed to processes no longer in existence are called ________.
A. rafted sediments B. nonexisting sediments C. pelagic sediments D. sorted sediments E. relict sediments