Change of any kind should be described in terms of the time over which the change takes place. Describe global climate change on these time scales:
(a) during the last 180 million years, (b) during the Cenozoic, (c) during the Quaternary, (d) during the last 21,000 years, (e) during the last 1000 years, (f) during the last century, (g) during the last decade.
What will be an ideal response?
a) Overall temperature has cooled over the last 180 million years, with many fluctuations.
b) Overall temperature has cooled during the Cenozoic, especially since about 40 million years ago.
c) Temperatures have fluctuated strongly during the Quaternary between very cold (ice age) and very warm times.
d) During the last 21,000 years, the overall temperature has warmed, because the peak of the last ice age was at 21,000 years ago.
e) There have been some ups and downs in temperature over the last 1000 years but the overall trend has been toward warmer conditions.
f) The overall trend over the last century has been warming, with some short-lived cooling spells (e.g., 1930–1940).
g) Temperatures have increased over the last decade.
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Scott moves from the Northwestern suburb of Hilliard (in the Columbus, Ohio area) to the eastern suburb of Gahanna. He continues to work downtown in the same office and goes out for happy hour with co-workers on Fridays. However, he does not see or interact with his old friends at the local high school football games as his kids are in a new attendance area. Scott's move is referred to as ________.
A. partial displacement migration B. total displacement migration C. directional migration D. proportionate migration
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A. Grow more water intensive crops, waste less water, and lower the price of water. B. Limit number of wells, grow more water-intensive crops, and build rain gardens. C. Subsidize water conservation, waste less water, and limit the number of wells. D. Lower the price of water, build rain gardens, use permeable paving materials. E. Waste less water, lower the price of water, and subsidize water conservation.