Sea water (salty water) percentage
97%
Glaciers water percentage
2,3%
Ground and surface water percentage
0,7%
Source
The beginning of a river
What can a source be
A glacier, melting snow from a mountain top, lake, spring
What add to the rivers flow
Precipitation and groundwater
Mouth
The end of a river
Where does the energy of a flowing rover come from
The force of gravity
What do rivers cause
They cause weathering (abrasion) and erosion (transportation of material)
Upper course description
Mostly erosion landforms.
Near the source
Upland stream
Hilly area
Ex. Water falls
Lower course description
Mostly deposition landforms.
Near the mouth
Flowing over flat land
Ex. Levées
Middle course description
Mostly deposition and erosion landforms
Mid-stream over more level of land
Ex. Meanders, transportation
Upper course velocity
Slow
Middle course velocity
Medium
Lower course velocity
Fast
Upper course width
Narrow
Middle course width
Medium
Lower course width
Wide
Upper course depth
Shallow
Middle course depth
Medium
Lower course depth
Deep
Upper course particle size
Big
Middle course particle size
Medium
Lower course particle size
Very small