Thursday, March 15, 2012

Page 283-286 Questions

1. Describe how rivers wear down rock materials.
            - They break up the bedrock and remove soil materials and eroded rock.
2. Describe how rivers transport materials.
           - There are 3 ways that materials are transported; in its bed load, suspension, and solution. When minerals are dissolved from the bedrock and moved its solution. When the river is muddy it is moving rock in suspension. Rocks that are too heavy to be moved in any of these are moved in bed rock along the bottom of the river.
3. How does a river's velocity affect its competence and capacity?
          -Competence is the maximum size of particles that the stream can carry. Capacity is the maximum amount of materials that a river can hold. If the river's velocity increased the capacity would get larger and if the river's velocity decreased the capacity would get smaller.
4. Under what circumstances do rivers and streams deposit sediment?
          - When the stream or river no longer has the energy to move them, they deposite the sediment.

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