North American glaciations used to be described in four episodes. However, two of those episode names, the Kansan and Nebraskan, are no longer used. What evidence did scientists use to redefine the glacial history on the North American continent?
What will be an ideal response?
Answer: Ocean cores show evidence for up to 20 glaciations, not simply 4.
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Describe the main way that glaciers move. In which situations is this essentially the only type of flow a
glacier will undergo? What will be an ideal response?
An afternoon sky full of cumulus humilis clouds with little vertical growth indicates ____ weather
a. stormy b. fair c. cold d. snowy e. rainy
Which of the following currents is western intensified?
A. California Current B. West Wind Drift C. Gulf Stream D. All of these are correct. E. None of these is correct.
Why did coal replace wood as the dominant fuel source?
A. It is easier to find. B. It is more energy dense. C. It is easily converted to a liquid. D. It is less expensive to produce.