Mrs Pires' River Environments - Quiz 2

What is the long profile of a river?

• The long profile shows you a cross-section, taken sideways, of a river’s channel and/or valley at certain points in the river’s course.

• The long profile shows the gradient of a river as it journeys from source to mouth.

• The long profile of a river it is upper and lower course.

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?

• True

• False

A river tries to achieve a smooth curve to reach its base level at sea; this is called a cross section. True or False?

• True

• False

Which section of the long profile is concave?

• Upper course

• Middle course

• Lower course

Where does the long profile start?

• At the mouth of a river.

• Where two rivers meet (confluence)

• At the source of a river.

Which stage of the long profile is shown in the image?

• Upper course

• Middle course

• Lower course

Which stage of the long profile is being described below?

Transportation mainly involves large boulders being moved by traction.

• Upper course

• Middle course

• Lower course

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?

• True

• False

Which part of the long profile has the deepest channel?

• Upper course

• Middle course

• Lower course

At which stage of the river does lateral erosion take over from vertical erosion as the predominant type of erosion?

• Upper course

• Middle course

• Lower course