"Secret cities" were the sites of all of the following except
A. agricultural collective farms
B. nuclear industry
C. biologic warfare research
D. missile and weapon design
A. agricultural collective farms
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Which of the following is the BEST indicator of the actual amount of water vapor in the air??
a. ?air temperature b. ?saturation vapor pressure c. ?relative humidity d. ?dew point temperature e. ?mixing ratio
For a rock to be considered an ore, it must
A. be shiny or otherwise noteworthy. B. contain enough of a commodity to be mined at a profit. C. contain some copper or gold. D. contain either quartz or sulfide minerals. E. be located in a mine.
Cfa and Dfa climate types:
From Table 29.1, the biome map, and the climate map, determine the terrestrial biome that best characterizes each of the following descriptions and write its name on the first line provided. On the second line, relate it to temperature and precipitation regimes and/or global pressure and wind belts outlined at the end of Section 1.
A reverse biomass pyramid is typical of
A) terrestrial ecosystems because of the high concentration of sunlight. B) terrestrial ecosystems because land can support more animals than water. C) aquatic ecosystems because top consumers reproduce much more slowly and live much longer than producers. D) aquatic ecosystems because water contains much more oxygen than air.