Which of the following terms refers to the number or mass of air molecules in a given space or volume?
A. pressure
B. temperature
C. weight
D. density
Answer: D
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A ball is thrown upward and caught when it comes back down. Neglecting air resistance, the speed with which it is caught is
A) more than the speed it had when thrown upward. B) less than the speed it had when thrown upward. C) the same as the speed it had when thrown upward.
The ________ was created when Pangaea broke apart
A) Antarctic Ocean B) Indian Ocean C) Pacific Ocean D) Atlantic Ocean
The black sand beaches in Hawaii are comprised of ________
A) ground up bottle and other debris placed there by Hawaii tourist bureaus. There is not natural sand in Hawaii because there is no quartz B) fragments of black coral C) fragments of obsidian glass D) fragments of basaltic volcanic rock
The message from author Garret Hardin's "lifeboat ethics" is that
A. Helping poor people will simply increase their rate of reproduction B. The world has enough resources for everybody C. Helping poor people will, in time, reduce their rate of reproduction D. Economic growth will reduce the birth rate of poor nations E. The poorer countries of the world are caught in a demographic trap