How has a decrease in the Arctic sea ice affected Arctic ecosystems?
a) subsistence-living inhabitants find it hard to get food because marine species live farther from shore
b) polar bears depend on ice for capturing prey and making dens
c) the Northwest Passage from the North Atlantic to the North Pacific will be ice free in the Arctic Ocean
d) sea level is rising on land
e) all of the above
E
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Use the diagram below to answer the questions that follow.
Which represents a sedimentary rock that did not experience contact metamorphism?
A. A B. B C. C D. D E. E
What is the main argument for nuclear power provided by the nuclear power industry with regard to environmental protection?
A. no greenhouse gas emissions B. no toxic chemicals C. no water pollution D. no land disturbance
Which action would be an ineffective preventive measure for acid deposition?
A. reducing coal use B. burning low-sulfur coal C. switching to natural gas or renewable energy resources D. adding lime to neutralize acidified lakes E. removing SO2 and NOx from motor vehicle exhausts
Which of the following statements regarding sea otters is correct?
A) Their bodies are covered with sparse hairs, which are concentrated around the mouth. B) They are one of the few types of animals known to use tools. C) They are some of the largest marine mammals. D) They continually lick themselves to clean their fur and add an insulating layer of air. E) They no longer inhabit all areas where they were hunted.