Which of the following is the likely direction of movement of an upper-level trough that shows retrograde motion?
A. east
B. north
C. west
D. south
Answer: C
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Sustainable use of the earth's water resources involves
A. an integrated approach to managing water resources and preventing water pollution throughout each watershed. B. continued subsidizing of the market price of water so that there is fair distribution of water. C. emphasis on waste management over waste prevention. D. discharge of hazardous wastes into deep wells. E. channel pollution into the oceans instead of lakes and rivers.
Answer the following statement(s) true (T) or false (F)1
1. The growing affluence in the United States in the 1900s was urban-based. 2. Air travel and telecommunications provide a vital infrastructure for future economic growth because they reduce the costs of distance between places. 3. Throughout U.S. history, most people have lived in cities. 4. In the late 1900s the Manufacturing Belt continued to be important although companies and products changed. 5. Recent immigrants have tended to congregate in Canadian cities but are not segregated by discrimination.
What is meant by the mixing time of the ocean?
The major iron ore minerals are ________.
A. pyrite and chalcopyrite B. galena and sphalerite C. calcite and dolomite D. hematite and magnetite E. mica and quartz