What enhances the ocean's buffering capacity?
a. The amount of dissolved inorganic carbon present
b. The amount of acid already present in the ocean
c. The amount of dissolved organic compounds
d. The amount of calcium
ANS: A
The ocean has a higher buffering capacity than rivers and lakes. This is due to the amount of dissolved
inorganic carbon found in the ocean. This makes the ocean less prone to large pH swings when acids
or bases are added whether it be from sewage outfalls or acid rain. Information can be found in the
section The Ocean's Acid-Base Balance Varies with Dissolved Components and Depth.
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Indicate whether the statement is true or false
First published in 1962, the book Silent Spring helped to establish
A) the modern civil rights movement. B) the modern environmental movement. C) the Food and Drug Administration. D) the National Wildlife Federation.
Which of the following is the most strongly supported by extensive hypothesis testing?
A) observation B) educated guess C) theory D) hypothesis E) speculation
At constant pressure the temperature of a 4.0 L sample of gas is decreased from 50. °C to 25 °C. What is the new volume of the gas sample?
A) 2.00 L B) 3.69 L C) 4.34 L D) 8.00 L