American cities in the northern United States, such as Chicago, Illinois, ________
A) have maintained a steady state population since the 1970s
B) have always grown rapidly and continue to do so
C) have steadily lost population over the past 40 years
D) have increased their rate of growth dramatically in the past 20 years
E) had their greatest populations in the 19th and early 20th centuries
C
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In the above diagram, which atom is oxidized, the darker colored atom or the lighter colored atom?
A. Both of the atoms are oxidized. B. Neither of the atoms is oxidized. C. Only the lighter colored atom is oxidized. D. Only the darker colored atom is oxidized.
The mean radius of Earth is ________ meters.
A. 12.742 × 109 B. 6.371 × 104 C. 12.742 × 106 D. 3.371 × 102 E. 6.371 × 106
The refundable charge of 5 or 10 cents for returning recyclable cans and bottles works like
A. an incentive to throw bottles and cans in the trash. B. command-and-control regulation. C. a market permit program. D. a pollution tax incentive to avoid littering.
Thermal belts are ____
A) pockets of warm air resting in a valley during the afternoon B) pockets of cold air resting on a valley floor at night C) warmer hillsides that are less likely to experience freezing temperatures D) cold, below-freezing air found at the top of a mountain