Comets are composed of ________.
A. electromagnetic plasma
B. mostly organic material
C. ice and rocky debris
D. solid rock, mostly andesite
E. gas, mostly hydrogen and helium
Answer: C
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What approach do many analysts call for in approaching our waste problems?
A. Waste management only B. Waste reduction only C. Integrated waste management D. Reusing only E. Recycling only
Political ecologists emphasize
A) the impact of political and economic forces on local cultures and resource use. B) traditional groups' involvement in the political process. C) environmental and resource policy. D) environmental ethics and the ethics of resource use. E) the impact of globalization on resource trade.
Suppose a west wind of 20 knots blows over a coastal region that is densely covered in shrubs. Which of the following describes the same wind's likely speed and direction if it moved over the middle of a large, calm lake?
A. greater than 20 knots and more southwesterly B. greater than 20 knots and more northwesterly C. less than 20 knots and more northwesterly D. less than 20 knots and more southwesterly
When experimenting with pucks on an air track you find that momentum is conserved for
A. elastic collisions. B. inelastic collisions. C. both of these D. none of the above