Drainage Basin

Question 1

The source

Answer 1

The source is where the river starts

Question 2

A tributary

Answer 2

A tributary is a stream or small river that flows into a bigger one.

Question 3

Watershed

Answer 3

A watershed is the boundary of a drainage basin

Question 4

Confluence

Answer 4

A confluence is the point where a small river joins a large one

Question 5

Mouth

Answer 5

The mouth is the end of the river

Question 6

A drainage basin

Answer 6

A drainage basin is the area drained by a river and its tributaries.

Question 7

What is the boundary of the drainage basin called

Answer 7

The watershed

Question 8

The river flows

Answer 8

In a channel

Question 9

The sides are called

Answer 9

Banks

Question 10

The bottom is called

Answer 10

The river bed

Question 11

How water moves through the drainage basin

Answer 11

1-water that runs overland is called surface runoff
2-some rain soaks into the ground. This is called infiltration
3-rain that soaks into the ground flows sideways through the soil. This is called throughflow
4-the water fills the pores and cracks in the rock. This is called groundwater
5-surface runoff, through flow and groundwater feed the river
6-impermeable rock won’t let water pass through it.