The depletion of the ozone layer near the poles had a major impact on the productivity of plankton. Indicate whether the statement is true or false
ANS: T
When there was a large hole in the ozone at the poles, the productivity of plankton decreased by 6% to
12% in the 1990s. This was because the plankton was receiving too much ultraviolet light. The ozone
normal acts as a shield to the atmosphere. Information can be found in the section Human Activity is
Causing Global Oceanic Change
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A population map of New Zealand would reveal
A. a concentration of people on South Island. B. a sparsely populated interior. C. the largest urban area centered on Christchurch. D. the locations of the Shire and Bree.
Several countries or cities have banned the use of thin plastic carrier bags because
A. the cost of plastic bags is high. B. they cannot be recycled. C. plastic bags plug sewers. D. All of these statements are correct. E. None of these statements is correct.
Which of the following will have the lowest freezing point?
A) 0.1 M NaCl B) 0.1 M BaCl2 C) 0.1 M AlCl3 D) All have the same freezing point.
What is the approximate diameter of the Milky Way Galaxy in light years?
A. 100,000 B. 100 C. 1000 D. 1000,000 E. 10