Rivers: Key Processes and Features

What is meant by 'Traction' ?

• Transportation of sand and silt only

• Transportation of soluble minerals

• Transportation of rock without rock leaving the river bed

• Transportation of small rocks

What do we mean by 'Hydraulic Action' ?

• The name of a flooded river

• The point where one river joins another

• To bounce rocks alone

• The power of the water to smash up rock

What do we mean by 'Suspension' ?

• To prevent the river from flowing

• Rock or mineral particles held in the water and who never touch the river bed

• To hang something from the ceiling

• To dissolve in the water

Vertical Erosion is when ...

• When water flowing over a shallow gradient erodes the bed

• When water flowing over a steep gradient erodes the banks

• Water flowing over steep gradient erodes the bed.

• When water flowing over a shallow gradient erodes the banks

What do we mean by 'Abrasion' ?

• The break down of rocks, in situ, or in their original position

• Rocks and sand rubbing against the bed and banks

• Rocks bouncing along the river bed

• Rocks being dropped along the route of the river

What is erosion?

• When rock is worn down by wind, water or ice, in situ, or in its original position

• When rocky material is picked up by the river

• When rocky material being transported by the river is dumped

• When rocky material is moved from on place to another

What is 'lateral erosion' ?

• When water erodes the sides of a rock only

• When water flowing over a steep gradient erodes the river's banks

• When water flowing over a shallow gradient erodes the river banks only

• When water flowing over a shallow gradient erodes the river's bed

Lateral erosion produces which kind of river feature?

• Delta

• Meander

• V-shaped Valley

• Waterfall

Waterfalls are associated with which other natural feature ?

• Gorges

• Ox-Bow Lakes

• River Cliffs

• Interlocking Spurs

Which group of river features are associated with a river's Upper Course?

• V-shaped valleys, waterfalls, gorges, interlocking spurs

• Source, Ox-Bow Lakes, waterfalls, Gorges

• Waterfalls, V-shaped Valleys, Deltas, Floodplains

• Deltas, flood plains, meanders Ox-bow lakes