The basal unit of the transgressive Kaskaskia sequence is marked by extensive black shale
deposition. Indicate whether the statement is true or false.
F
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Why might coating a metal with another metal that is easier to oxidize prevent the first metal from being oxidized?
A. The metal that is acting as the coating is protected from moisture and oxygen. B. The metal that is coated is protected from moisture and oxygen so it doesn't react. C. It doesn't prevent it, but helps to slow it down. D. All of the oxidizing agent is consumed by reacting with the easily oxidized metal. E. all of the above
Evaporite deposits such as borates formed as a result of the drying up of large pluvial lakes in the
western United States. Indicate whether the statement is true or false.
The number of dead zones has ________ every decade from the1960s into the twenty-first century
A) doubled B) tripled C) quadrupled D) quintupled E) increased ten-fold
The earliest documented recognition that misuse of the natural environment can have nasty consequences was
A. Plato's writings 2500 years ago. B. George Perkins Marsh's 1864 publication of Man and Nature. C. Roosevelt's warnings about overuse a century ago. D. Rachel Carson's Silent Spring, alerting the public to the dangers of pollution in 1962.