Why might coating a metal with another metal that is easier 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 by reacting with 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
A
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Which of the following is true about the Ogallala aquifer?
A) It was featured in the movie A Civil Action. B) Water levels are dropping primarily because of overpumping. C) It is a confined aquifer so is replenished as fast as water is used. D) None of these are correct.
China and the United States account for over 60% of the world's ________
A) natural gas reserves B) coal consumption C) oil reserves D) coal reserves
The principle of original horizontality states that ____________________ rocks were deposited in
horizontal layers. Thus, if rock layers are now ____________________, they must have been disturbed after lithification. Fill in the blank(s) with the appropriate word(s).
In humid, tropical climates, many rocks weather to a material rich in:
a. calcium and magnesium carbonate b. quartz c. iron and aluminum sulfides d. iron and aluminum oxides