Rivers and waterfalls

Question 1

Definitions: runoff

Answer 1

Some rain falls on the land and runs back to the ocean

Question 2

Evaporation

Answer 2

Heat causes vapour to rise in to the atmosphere

Question 3

Condensation

Answer 3

The water vapour cools and condenses into water droplets

Question 4

Precipitation

Answer 4

Once the droplets become to heavy they fall from the sky as rain

Question 5

Parts of a river system: source

Answer 5

The start of a river

Question 6

Mouth

Answer 6

Where the river joins the ocean

Question 7

Tributary

Answer 7

A small stream that joins up to the river

Question 8

Confluence

Answer 8

The point where two rivers join

Question 9

Watershed

Answer 9

The boundary between one drainage basin and another

Question 10

Material transportation: traction

Answer 10

Boulders roll along the river bed

Question 11

Saltation

Answer 11

Small particles bounce along the river bed

Question 12

Suspension

Answer 12

Fine particles are carried along in the water of the river

Question 13

Parts of a river system: meander

Answer 13

A sweeping bend in the river

Question 14

Solution

Answer 14

Some minerals dissolve in the water and get carried by the currant

Question 15

What is hydraulic action

Answer 15

This is the sheer power of the water as it smashes against the river banks

Question 16

What is abrasion

Answer 16

When pebbles grind along the river bank and bed in a sandpapering effect.

Question 17

What is attrition

Answer 17

When rocks that the river is carrying knock against each other. They break apart to become smaller and more rounded

Question 18

What is solution in erosion terms

Answer 18

When the water dissolves certain types of rocks