Why has San Francisco Bay suffered from pollution and experienced a decline in the quality of its marshes?
A. water diversions from the Sacramento River
B. water diversions from the Colorado River
C. draining of Mono Lake
D. water diversions by the Los Angeles Aqueduct
Answer: A
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What is the basis for life in the hydrothermal vent community?
a. The heated waters surrounding the vents b. Chemosynthetic organisms c. Whale falls d. The biological productivity of the water above
Israel is a relatively rich state, with ________ percent of its people living in cities
A) 50 B) 75 C) 81 D) 92
The principal cause of desertification is:
A) warming global temperatures due to the burning of fossil fuels. B) inappropriate land use such as agricultural clearing and overgrazing. C) extended droughts in untouched rain forest climates. D) air pollution as rural areas become urbanized.
Atmospheric pressure is the weight of the column of air over an area. For example, under standard conditions, the atmospheric pressure is 14.7 lbf/in.2 . This value means that the column of air in the atmosphere above a surface with an area of 1 in.2 will exert a force of 14.7 lbf. Convert the atmospheric pressure in the given units to the requested units: (a) 14.7 lbf/in.2 to lbf/ft2 , (b) 14.7 lbf/in.2 to Pa, (c) 14.7 lbf/in.2 to kPa, and (d) 14.7 lbf/in.2 to bars. Show all of the conversion steps. [Note: One Pascal (1 Pa) is equal to one newton per meter squared (1 Pa = 1 N/m2 ) and 1 bar = 100 kPa.]
What will be an ideal response?