12 Questions
A river is a stream of water that flows within a ______.
channel
Hills and mountains are the source for many ______.
rivers
The riverbed has a steep slope, and its valley is ______.
narrow
As a river nears its mouth, it slows down and drops ______.
sediment
If rain is heavy, a river can flow over its ______.
banks
Weathering occurs in rivers when the current causes rocks to bump against each other and break apart. It can also occur when waves crash against a ______.
cliff
This process can help create soil, when weathered rock combines with ______ matter.
organic
Factors such as wind and ______ can also cause erosion.
gravity
Deposition occurs when water slows down and drops the rocks and ______ it carries.
sediment
Water can enter cracks in rocks, and can ______ there.
freeze
A glacier is a river of ice moving downhill very ______.
slowly
Glaciers cause erosion by pushing the broken pieces of rock under them and on top of them as they ______.
move
Learn about the formation of rivers, the changes in width, volume, and flow, as well as the source, mouth, and characteristics of rivers such as the steep slope of the riverbed. Find out how sediment is carried by flowing rivers and how rivers can widen as other rivers join them.
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