What does the "rule of 70" apply to?
A) how long it takes a population to double in size
B) death rates during a famine
C) migration from one continent to another
D) economic prosperity in a former colony
E) cartograms of world population
A
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A population that has been at or below replacement-level fertility for decades will
A) stop growing or decrease in size. B) produce large numbers of emigrants. C) increase in size. D) exceed its carrying capacity.
Analyze the map and select the proper response for each missing term or phrase. 
Analyze the map and select the proper response for missing term or phrase for number 6.
A. Galaxy B. Solar system C. Universe
Which of the following is incorrect about glacial movement?
A) Glaciers are mostly stationary, only moving several centimeters over tens of years. B) Glaciers move in streamlike patterns, merging as tributaries into large rivers of ice. C) Glacial movement produces distinct landforms. D) Glaciers move under the pressure of their own weight and the pull of gravity. E) The greatest movement within a valley glacier occurs internally.
Which wavelengths in the electromagnetic spectrum are most likely to reach Earth's surface?
A. X-rays B. Gamma rays C. Visible light and heat D. Ultraviolet (UV) radiation