Hydrosphere: V-Shaped Valleys Flashcards
rivers start as…
small streams in upland areas
in the upper course…
rivers receive their water supply from rainfall and flow quickly downhill due to the steep terrain
since discharge is low…
the river only has enough energy to erode downwards, which is known as vertical erosion
the river cuts a…
deep notch into the landscape through erosion.
mention the 3 erosional processes used
- abrasion
- hydraulic action
- solution
the valley sides are attacked by…
freeze-thaw weathering, which breaks up and loosens rock
rain and gravity…
pull the material down into the river, where it aids with erosion as it is carrie downstream
mention the 2 transport processes which allows rocks to aid in erosion
- traction
- saltation
as a result of these processes…
the river valley becomes deep and steep sided, taking on a V-shape in its cross section
interlocking spurs form because…
the river follows a winding course around the more resistant rock found in upland areas
the river channel takes up…
the whole river valley, as opposed to a small misfit stream in a U-shaped valley
