The Canadian province of Alberta has the world's largest commercially developed deposit of which fossil fuel?
A) Anthracite coal
B) Natural gas
C) Petroleum
D) Tar sands
Answer: D
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Why did Heezen and Tharp have to do "inspired guessing" when creating their maps of the ocean floor?
a) They were limited by the mapping technology of the time. b) The data they used came from tracks of ships that overlapped each other. c) Data could not be collected for parts of the ocean that were greater than 10,000 feet deep. d) They were given only a small portion of the depth data by the Navy. The rest was classified. e) There were gaps in the data that were used to make the map because the tracks of the ships collecting the data were widely spaced.
Some estimates suggest that logging occurs ________ times faster in Southeast Asia than in the Amazon
A) 2 B) 3 C) 4 D) 5 E) 10
A number of lakes in North America no longer have fish in them. One reason for this is:
A) carbon monoxide dissolves in the water and makes it toxic. B) the hole in the ozone layer has allowed too much UV to penetrate the water. C) acid rain has made the water more acidic, causing it dissolve toxic aluminum from the soil. D) acid rain falling directly onto fish kills them instantly.
Although many elements are dissolved in seawater, no gases are dissolved in it
Indicate whether the statement is true or false