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The physical improvement resource
The water cycle.
powered by the Sun's energy the water cycle is the constant movement of water. This allows rivers to always flow.
a stream or river that flows into a larger river
A region or area bounded peripherally by a divide and draining ultimately to a particular watercourse or body of water
the path that a stream follows.
change in elevation over a distance. This allows the river to move fast or slow and erode more or less.
the size of rock a stream carries. bigger = more erosion.