6.3.What work do rivers do?

'the wearing away of the banks and bed of the river by the power of the flowing water in the channel'

• erosion

• emulsion

• weathering

• climate

Rivers flow ______________ from higher land due to gravity

• sideways

• uphill

• downhill

• diagonally

Where the ____________ of the river in upland areas is steep, the river is fast-flowing.

• height

• shape

• gradient

• colour

The river channel is full of bits of rock and finer material, which is called _____________.

• sofaload

• bedload

• chairload

• deskload

_________________ takes place when a river slows down and no longer has the energy to carry the material it is transporting, so it drops some.

• erosion

• transportation

• deposition

As rock is eroded by rivers it is then _______________ along the channel

• eroded

• transported

• caught

'the material being carried by the river hits the sides and bed of the channel, each impact breaking pieces off the bed and banks.'

• attrition

• abrasion

• corrosion

• hydraulic action

'rocks and stones in the river bang against each other, chipping bits off so the rocks become more rounded and smaller.'

• attrition

• abrasion

• corrosion

• hydraulic action

'the force of the water pushes into cracks in the rock at the bed and banks, breaking bits off'

• attrition

• abrasion

• corrosion

• hydraulic action

'rocks such as chalk and limestone are dissolved in the river water and carried away as dissolved material.'

• attrition

• abrasion

• corrosion

• hydraulic action