If petroleum is in short supply relative to demand, its price tends to rise. How does this affect the demand for coal?
What will be an ideal response?
Answer: When oil prices rise, demand for coal rises to the extent that coal can be substituted for oil.
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What is the political status of Puerto Rico?
A) It is a possession of the United States, but its residents are not U.S. citizens. B) It is a colony of Spain. C) It is a commonwealth of the U.S. and its residents can move freely to the U.S. mainland. D) It is a state of the Republic of the Greater Antilles. E) It is an independent country.
One would expect a cP air mass to be:
a. cold and dry. b. cold and moist. c. warm and dry. d. warm and moist.
Millennial-scale oscillations
A) typically begin with a slow increase in temperature. B) take 500 or so years for a complete cycle. C) indicate the earth flips back and forth between warmer states and colder states. D) have little impact on precipitation patterns.
How do point and non-point sources differ? Give one example of each.
What will be an ideal response?