By A.D. 1000, a city-based world empire had NOT yet occurred in
A) Europe.
B) North America.
C) the Middle East.
D) China.
Answer: B
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If champagne has a proof of 28, how many milliliters of alcohol are in 250 mL of champagne?
A. 35 B. 3.8 C. 200 D. 38 E. 28
Pattern forecasting
A) is not a valid technique and should seldom be used. B) is used only by forecasters who do not understand the atmosphere. C) is the same as the analog approach and is a useful and valid technique. D) is used only when one has no other information to go by.
About how many bison were living on the Great Plains before Euro-Americans began hunting them?
A) 80,000 B) 800,000 C) 8,000,000 D) 80,000,000
Which of the following is not a principle of Ecosystem function?
A) Ecosystems are always open to gains and losses of matter and energy. B) Ecosystem change is inevitable and essential. C) Matter and energy are neither created nor destroyed. D) Ecosystem's processes are self-regulated by interactions among their living and nonliving components. E) Ecosystems have distinct boundaries that are influenced by the abiotic factors in the ecosystem.