What is the average pH of the ocean?
a. 7.0
b. 7.5
c. 8.0
d. 8.5
ANS: C
Although the pH can vary in particular regions and depths of the ocean, the average pH is 8.0. The
amount of carbon dioxide can have large impacts on the pH levels. The range of pH found in the ocean
is approximately 7.0 to 8.5. Information can be found in the section The Ocean's Acid-Base Balance
Varies with Dissolved Components and Depth.
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The United States government supports the development and export of film and television because
A) they are entertaining to watch. B) American films are responsible for 50% of total box office receipts. C) it exports American culture to other countries. D) they generate wealth and jobs for Americans.
Judge the following sentence according to the criteria given below: Continental slopes around the margin of the Pacific Ocean are greater than the global average slope BECAUSE the Pacific Ocean is the world's largest ocean, covering more than half of
the ocean surface area on Earth. 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.
If Earth's axial tilt were less (i.e., closer to vertical), we would experience less variation in climate between seasons.
Answer the following statement true (T) or false (F)
What are the causes for metamorphism?
a. Heat b. Pressure c. Fluids d. Parent Rock e. All of the above