Mediterranean agriculture is common in all of the following except:
A) Yemen
B) Turkey
C) Morocco
D) Tunisia
A
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ANS: C
Oxygen in itself is a very reactive element. It binds quickly to other materials. Remember, free oxygen only became abundant in our atmosphere when photosynthetic organisms began producing more. Thus, if there is a large amount of free oxygen, then there is something present that is replacing it in the atmosphere. This is likely to be a life-form of some sort. Information can be found in the section Are There Other Ocean Worlds
Large volcanic eruptions with an ash veil that enters the stratosphere, tend to __________ at the
surface. a. increase temperatures b. increase precipitation c. decrease temperatures d. have no effect
Snow does not immediately melt away on a mild spring day because:
A) snow is more resistant to melting when it's been sitting on the ground for a long time. B) shortwave radiation from the sun is absorbed but not re-radiated as longwave. C) the high albedo of the snow keeps air temperatures cooler. D) snow allows more longwave radiation to be absorbed by the air.
Photovoltaic cells are ________
A) devices that directly convert fuel to electrical currents B) batteries that fuel automobiles and buses C) devices that directly convert sunlight to electrical currents D) batteries that derive energy from plant material E) devices that derive energy from plant material