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Chapter 4 Lesson 1
Term | Definition |
---|---|
lock | a gateway passageway used to raise or lower boats in a waterway |
tributary | a small river that flows into a larger one |
levee | a raised riverbank used to control flooding |
Continental Divide | an imaginary line through the Rocky Mountains that separates rivers that flow west from rivers that flow east |
coastal plain | a flat lowland next to a coast |
fall line | an area where waterfalls flow from higher to lower ground |
cordillera | a region of parallel mountain chains |
timberline | the elevation above which it is too cold for trees to grow |
ethanol | a liquid fuel made in part from plants |
national park | a park that has been set aside for the public to enjoy for its great natural beauty |
chinook | a dry wind that sometimes blows over the Great Plains in winter |