We can hypothesize with some confidence that Costa Rica has a lower crude death rate than the United States because Costa Rica
A) has a higher sex ratio.
B) has more hospitals per person.
C) has a milder climate.
D) is in Stage 4 of the demographic transition.
E) has a lower percentage of elderly people.
Answer: E
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Which method do scientists argue is most effective at reducing the amount of air and water pollution?
A. A shift to energy sources such as solar and windpower. B. Attaching pollution control devices to smokestacks. C. Injecting steam into the ground to remove groundwater contaminants. D. Collecting runoff from construction sites before it enters a river.
Couples in their thirties
A) have less education than the previous generation. B) get married younger than any previous generation. C) are more likely to get divorced than any previous generation. D) have a lower standard of living than any previous generation.
If the mass of Earth somehow increased with no change in radius, your weight would
A) increase also. B) decrease. C) stay the same.
Fogs "burn off" from the ground up
Indicate whether the statement is true or false