S5 Geog 1st Term Joint Test Revision

The energy of a river is affected by the following factors: (choose all correct answers)

• the speed of water flow

• the amount of channel water

• the size of the ocean

• the amount of water in the hydrological circulation

The volume of river water passing a given cross-section of its channel within a given period of time (usually in a second) in known as _____________.

• watershed

• confluence

• estuary

• discharge

Four major types of erosion include attrition, abrasion, solution and ___________ action.

Three directions of erosional processes include headward erosion, lateral erosion and ___________ erosion (a.k.a. downcutting)

Select all the correct factors below which can help increasing the amount of channel water:

• Increase of drainage density

• Decrease of vegetation cover

• Increase of the permeability of rocks

• Decrease in rainfall

• Increase in the steepness of slope

In the middle course of a river, transportation is the major fluvial processes which include solution, suspension, saltation and ___________ (happens when boulders rolled & dragged along the river bed).

_______________ is significant in the lower course. It occurs at the estuary and the inner banks of the river. It also occurs at the river bed during summer season.

• Erosion

• Transportation

• Deposition

When the river starts to lose its energy, it drops the __________ & __________ load first. This process is known as sorting.

• lighter

• heavier

• larger

• smaller

The boundary of a river basin is known as the ____________.

Which part of the river has the most gentle gradient of slope?

• lower course

• middle course

• upper course