They get wider by wheatering out the surronding rocks , erosion.
Sand, dirt or rocks falling in clumps off the side of the river, building up and hardening making more or the land and less of the river
A mature river erodes its channel wider rather than deeper. The gradient of a mature river is less steep than young rivers, and the water flows more smoothly. Examples of mature rivers are the Thames, Mississippi, and Ohio rivers.
No some rivers can become wider, smaller, deeper and narrower. not all of them follow the same pattern.
The acids and the moving water erode the banks and the bottom of the river.
mature rivers are wider insted of deeper. the gradient isn't that steep. mature rivers have few water falls and have many tributaries . they have more load then younger rivers.
No ,there are many deeper rivers.
Is a river with a gradient that is less steep than those of youthful rivers and flows more slowly. It is fed by many tributaries and has more discharge than a youthful river and its channels erode wider rather than deeper.
A lake
a river gets wider from source to mouth a river gets deeper from source to mouth a rivers load gets smoother from source to mouth a rivers load gets smaller from source to mouth the velocity of a river stays the same from source to mouth
channel
mature.
channel
youthful river:erodes deeper than widerit flows quicklynarrow and straightfew tributariesmature river:erodes wider than deepernot steephas many tributariesold river:has little erosive energywidehave few tributaries than the mature river