Prior to the Agricultural Revolution, our ancestors produced their own food by farming
a. True
b. False
Indicate whether the statement is true or false
False
RATIONALE: Until about 10,000 years ago, our ancestors lived by hunting and gathering (also known as foraging).
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Of all the world's fresh water, nearly ________ percent is tied up in glaciers, ice caps, and snowfields.
A. 25 B. 75 C. 90 D. 50
The Ouachita mobile belt occurred in the northern part of Canada adjacent to the Canadian
shield. Indicate whether the statement is true or false.
Why does a potassium-argon dating time scale reset during heating?
A) Expansion of the crystal structure may permit the loosely caged argon atoms to escape. B) Reduction of the crystal structure may permit the loosely caged argon atoms to escape. C) It gets so hot that it throws off the time scale. D) This does not happen.
The 24-unit tidal power plant at the La Race River estuary in France can generate, at peak operating capacity, enough electricity to power about ________ average U.S. homes
A) 24,000 B) 30,000 C) 40,000 D) 50,000 E) 60,000