The River Valley

The area of land drained by a river and its tributaries is called a:

• watershed

• estuary

• drainage basin

• delta

The point where the river starts is called the:

• source

• mouth

• tributary

• confluence

A smaller stream or river that flows into a larger river is called a:

• source

• mouth

• tributary

• confluence

The point at which two streams or rivers join is known as a:

• source

• mouth

• tributary

• confluence

An area or ridge of land that separates waters flowing to different rivers, basins, or seas is known as a:

• drainage basin

• watershed

• estuary

• delta

The point at which the river joins the sea, or larger body of water, is called the:

• delta

• estuary

• source

• mouth

The path of a river as it flows downhill is called its:

• channel

• valley

• long profile

• course

True or false? The long profile of a river shows how the gradient (steepness) changes over the different courses.

• True

• False

True or false? The cross profile shows what the cross-section of the river looks like.

• True

• False

The gradient of the upper course of a river is:

• gentle

• steep

• medium