Q.1
Where is the flow of the river fastest?
  • In the upper course
  • In the middle course
  • In the lower course
  • Where it meets the sea
Q.2
In which part of a river does solution occur?
  • In the upper course
  • In the lower course
  • All the way along the length of the river
  • Where the river is in contact with soluble materials
Q.3
Where in a river valley is lateral erosion dominant?
  • In the upper course
  • In the middle course
  • In the lower course
  • Where the river goes into the sea or a lake
Q.4
Which of the following correcty describes saltation?
  • The particles carried by a river are bounced along the river bed
  • Where a river passes over an area of rock salt, the salt is dissolved by the river water
  • Boulders falling into the river in the upper course
  • When an ox-bow lake is formed, the water loses its oxygen and becomes smelly
Q.5
Which of the following features is an erosional feature of the upper course of a river?
  • Waterfall
  • Meander
  • Delta
  • Ox-bow lake
Q.6
Hydraulic erosion is caused by:
  • water washing over the banks of the river during times of flood
  • large boulders smashing against the banks and bed of the river
  • decreased pressure where air is trapped in cracks of the river banks and bed
  • increased pressure where air is trapped in cracks of the river banks and bed
Q.7
By the time a river is in its lower course, there are no large boulders being carried along. Which of the following could be a reason for this?
  • Hydraulic action
  • Abrasion
  • Attrition
  • Solution
Q.8
In the introduction to this quiz, we mentioned the processes of abrasion and solution. Look at the following pairs of words. Which pair gives the alternative words that are used to describe the two processes in the order of abrasion and solution?
  • Corrasion/corrosion
  • Corrosion/corrasion
  • Corrasion/collation
  • Collusion/corrosion
Q.9
Which of the following is part of a waterfall?
  • Meander
  • Plunge pool
  • Gorge
  • Delta
Q.10
Waterfalls are often created where there is a resistant band of rock that has softer, less resistant rocks above and below. The rocks below are eroded creating an overhang. From time to time the overhang will collapse and so the waterfall gradually move further and further upstream. This is called:
  • backup
  • backing
  • vertical creep
  • retreat
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