Rivers

Question 38

Flood plain

Answer 38

The relatively flat area forming the valley floor on either side of a river channel, which is sometimes flooded.

Question 39

Waterfall

Answer 39

Sudden descent of a river or stream over a vertical or very steep slope in its bed. It often forms where the river meets a band of softer rock after flowing over an area of more resistant material

Question 40

Gorge

Answer 40

A narrow, steep sided valley, often formed as a waterfall retreats upstream.

Question 41

Interlocking spurs

Answer 41

A series of ridges projecting out on alternate sides of a valley and around which a river winds its course.

Question 42

Estuary

Answer 42

The tidal mouth of a river where it meets the sea; wide banks of deposited mud are exposed at low tide.

Question 43

Ox bow lake

Answer 43

An arc-shaped lake which has been cut off from a meandering river.

Question 44

Levee

Answer 44

Embankment of sediment along the bank of a river. It may be formed naturally by regular flooding or be built up by people to protect the area against flooding.

Question 45

Meander

Answer 45

A pronounced bend in a river.