Agricultural density is the number of
A) farm animals per area suitable for agriculture.
B) farmers per area of arable land.
C) farms per total area of land in a country.
D) people per area of arable land
E) acres of farmland per the total area of a country.
Answer: B
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When a 100-N object is suspended at rest by two equally taut vertical strands of rope, the tension in each strand is
A. more than 50 N. B. 50 N. C. less than 50 N. D. 100 N.
Which of the following represents the most recent time that thick sheets of ice advanced over North America as far south as New York?
A. 18,000 to 22,000 years ago B. 45,000 to 50,000 years ago C. 250,000 to 500,000 years ago D. 2 million years ago, at the beginning of the Pleistocene epoch
Suppose the winds aloft are geostrophic and blowing from the north. In which of the following directions is low pressure located?
A. south B. east C. west D. north
Topsoil contains predominantly
A. Organic material B. Insoluble minerals and sand C. Plant roots D. Mineral material E. Mixed organic material and mineral particles