Which of the following is NOT influenced by the Pacific Decadal Oscillation (PDO)?
A) Sea-surface temperatures
B) Wind directions and strengths
C) Populations of salmon
D) Lengths of glaciers
E) All of these choices are correct
E) All of these choices are correct
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The least effective way to deal with air pollution is to
A) make smoke stacks higher. B) add filters to polluting stacks. C) limit the amount of pollution in a particular location. D) All of these
Remote sensing is
A) a subjective determination of temperature. B) the monitoring of a distant object without physical contact. C) an earthbound technique not used in modern satellites. D) based on the principle that surfaces must be physically handled and directly measured for study.
Rock deep within the Earth is ________ and ________.
A. cool; heat flows in toward Earth's center B. unknown; we can only guess about conditions there C. hot; heat flows inward toward Earth's center. D. the same temperature throughout the earth; heat flow is not an important consideration E. hot; heat flows out toward Earth's surface
Changes in Earth's elliptical orbit around the Sun is called
A) eccentricity. B) obliquity. C) precession. D) inclination.