3.You are told that you are going to visit a region that was under a glacier for many thousands of years ending about 20,000 years ago, but was near where the glacier ended by melting, so lots of meltwater streams flowed through the glacier to the bed and out the front. What will you probably find in the landscape? A) The tracks of the glaciers will have been erased by streams, wind, and mass movement.B) The tracks of the glaciers will remain but be very hard to see because streams, wind and mass movement will have almost completely erased those tracks.C) The tracks of the glaciers will be easy to see, although minor modification by streams, wind and mass movement will have started.D) The tracks of the glaciers will be completely unmodified, because streams andwind and mass movement cannot cause any changes over 20,000 years.E) There will be no tracks of glaciers because glaciers with much meltwater don’t affect the landscape at all.Feedback: “Wet” glaciers, those with much meltwater, modify the landscape faster than do streams, wind or mass movement in most cases, but streams and wind and mass movement do make a difference over thousands of years or longer. So the glacier tracks from 20,000 years ago remain clear but are starting to be modified by other processes.
Points Earned: 1.0/1.0 Correct Answer(s):C 4.The ridge left behind by a glacier that outlines where the glacier had been is called: Feedback: The beautiful moraines of Cape Cod, Long Island, Moraine State Park in Pennsylvania, Kettle Moraine State Park in Wisconsin, and elsewhere include unsorted till and sorted outwash. Points Earned: 1.0/1.0 5.Evidence that there was much more land ice about 20,000 years ago than there is now includes:
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