A pound of ordinary bituminous coal typically contains ________ percent carbon.
A. 10
B. 90 to 95
C. 5
D. 45 to 86
E. 100
Answer: D
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Salinity of seawater is a measure of ____
A)the total sodium and chloride B)the total quantity of dissolved solids C)trace elements D)chemical weathering in the oceans E)the volume of elements outgassed
Volcanoes are triggered by
A) changes in solar radiation. B) movement of tectonic plates. C) human mining activities. D) major changes in climate.
The most inclusive multinational organization is the WTO
Indicate whether the statement is true or false
The term demographic transition refers to ________
A) the slowing down in the growth of a population as it approaches its biocapacity B) the decline in death rates followed by a decline in birth rates that occurred because sanitation levels in areas improved C) a requirement for a population to reach a specific size before it becomes stable D) the slowing down in the growth of a population as it approaches the carrying capacity E) the decline in death rates followed by decline in birth rates when a country develops a strong economy