What does changing river shape mean
How a river changes from source to mouth
How does the river change from source to mouth
It becomes wider deeper and slower
What is the long profile of a river
The change in height of a river from source to mouth
What is the gradient like near the source
Very steep
What type of erosion dominates near the source
Vertical erosion
What landform is created by vertical erosion
V shaped valleys
What is the valley shape like in the upper course
Narrow and steep sided
What happens to the river channel in the middle course
It becomes wider and deeper
What type of erosion dominates in the middle course
Lateral erosion
What landform forms due to lateral erosion
Meanders
What happens on the outside of a meander
Fast flow causes erosion
What happens on the inside of a meander
Slow flow causes deposition
What is the river shape like in the lower course
Very wide deep and flat
What landform forms in the lower course
Floodplains and levees
Why does deposition increase downstream
The river loses energy
What happens to sediment downstream
It becomes smaller and smoother due to attrition
Why does the river slow down downstream
The gradient becomes gentler