Which of the following rocks is most likely to be formed from compacted plant remains?
a. coal
b. limestone
c. rock salt
d. marble
e. granite
A
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Which continent has the greatest number of inhabitants?
A) North America B) South America C) Europe D) Africa E) Asia
Ozone is found primarily in the ________ and is important because of ________
A) stratosphere; its interaction with ultraviolet radiation B) troposphere; it enhances thunderstorm development C) mesosphere; it makes the mid-levels of the atmosphere cold D) thermosphere; it makes the upper levels of the atmosphere very warm
Humid air is more dense than dry air at the same temperature
Indicate whether the statement is true or false
Which of the following is not a reason for the energy deficit in the polar regions?
A) low sun angle B) diffuse insolation C) up to six months without insolation D) high albedo due to snow and ice E) little seasonal variability