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A boundary that marks the place where the higher land of the Piedmont drops to the lower Atlantic Coastal Plain.
One of North America's largest rivers - it flows from Minnesota to the Gulf of Mexico
places for catching fish and other sea animals. The Grand Banks is one of the world's richest.
the center of the North American continent - it has a humid continental climate with very cold winters and hot summers.
the elevation above which trees cannot grow, area in which only lichens and mosses can grow
A warm, dry wind that blows in spring down the eastern slopes of the Rockies, melting the snow
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