Glacial surges may be associated with
A) soft bed below the glacier. B) lubrication from meltwater.
C) water pressure under the glacier. D) water pressure, soft bed, or lubrication.
D
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Macroalgae/seaweeds can be best differentiated from true plants because macroalgae/seaweeds ________.
A. are photosynthetic B. are prokaryotic C. have no true roots, leaves, or stems D. are mostly unicellular E. have no chlorophyll
Oil price history shows that prices have changed sharply on several occasions. Which is NOT an event that led to a sharp fluctuation in barrel price?
A) OPEC refused to sell oil to allies of Israel in 1973. B) The end of the Iran-Iraq war in 1988 led to lower prices. C) Oil companies control supply of oil in Southwest Asia in the early 70s keeping prices low. D) The U.S. government removes all subsidies in 1980 to major oil companies like Exxon-Mobil causing an increased prices. E) The Iranian Revolution in 1979 and Iran-Iraq war trigger oil shortages and higher prices.
Glacial ice is primarily "salt" water.
a. true b. false
The approximate maximum thickness of contemporary glacial ice is ________
A) 4 meters (13 feet) B) 40 meters (130 feet) C) 400 meters (1,300 feet) D) 4,000 meters (13,000 feet) E) 40,000 meters (130,000 feet)