River Valleys – Long and Cross Profiles Multiple-choice Quiz
The long profile shows the gradient of a river as it journeys from source to mouth.
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The long profile shows the gradient of a river as it journeys from source to mouth.
The long profile of a river is a way of displaying the channel slope (gradient) of a river along its entire length. True or False?
The long profile of a river is a way of displaying the channel slope (gradient) of a river along its entire length.
A river tries to achieve a smooth curve to reach its base level at sea; this is called a cross section. True or False?
A river tries to achieve a smooth curve to reach its base level at sea; this is called a graded long profile.
Which section of the long profile is concave?
The middle course of the long profile of a river is concave.
Where does the long profile start?
The long profile of a river starts at its source.
Which stage of the long profile is shown in the image above?
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Which stage of the long profile is being described below? Transportation mainly involves large boulders being moved by traction.
Transportation in the upper stage main involves large boulders being moved by traction.
The velocity of water in a river is greater in the upper stage than the lower stage of the long profile of a river. True or false?
The velocity of a river increases downstream because a lower proportion of water comes into contact with the bed and the banks reducing friction.
Which part of the long profile has the deepest channel?
The lower course of the river has the deepest channel. This is because the volume of water is the greatest.
At which stage of the river does lateral erosion take over from vertical erosion as the predominant type of erosion?
Lateral erosion takes over from vertical erosion as the predominant type of erosion in the middle course.
True or false? A cross profile is a cross-section, taken sideways, of a river's channel and/or valley at certain points in the river's course.
Where along the long profile of a river is the cross section narrow and steep-sided?
Where along the long profile of a river does the cross section become wider due to lateral (sideways) erosion?
Where along the long profile of a river does the cross section show an almost flat valley?
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