Why might coating a metal with another metal that is harder to oxidize prevent the first metal from being oxidized?
A) It doesn't prevent it, but helps to slow it down.
B) All of the oxidizing agent is consumed using up the easily oxidized metal.
C) The metal that is coated is protected from moisture and oxygen so it doesn't react.
D) The metal that is acting as the coating is protected from moisture and oxygen.
E) all of the above
C
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Some people become alarmed when they learn that the water they drink contains known carcinogens. These concerned people
A) are rightly alarmed, because all municipal drinking water should be free of any carcinogens. B) should be somewhat alarmed but might be comforted by knowing that some of these carcinogens are known to cause cancer only in mice. C) should know that it is the concentration, and not the presence of carcinogens, that is of greatest concern. D) should not be concerned, because it is the combination of carcinogens, and not the presence of any one carcinogen, that poses a health risk.
List five main types of fog and describe how each type forms
What will be an ideal response?
Judge the following sentence according to the criteria given below: Buckshot barnacles cannot survive above the high tide shoreline BECAUSE they have a protective shell
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
The geographer's concern with the Earth's interior is restricted primarily to its influence on ________
A) magnet fields B) magma intrusions C) foliation D) oxidation E) Earth surface features