Weathering, Erosion and the Transportation of Rocks

Question 1

Define Weathering

Answer 1

The breakdown of rocks in situ

Question 2

Define situ

Answer 2

Without movement

Question 3

Define erosion

Answer 3

The breakdown and removal of material by rivers, sea, glaciers and wind

Question 4

Name four ways of Erosion

Answer 4

Hydraulic action, Abrasion, Attrition and Solution

Question 5

Define Hydraulic action

Answer 5

The force of water breaking rock particles away. The river constantly goes into the sides going through tiny cracks breaking rock

Question 6

Define Abrasion

Answer 6

When rocks scrape and rub against a rock platform. It makes the rock smoother, smaller and rounder

Question 7

Define Attrition

Answer 7

When rocks picked up smash into each other and break into smaller rounder fragments.

Question 8

Define Solution (in erosion)

Answer 8

When water dissolves some types of rock

Question 9

Why two types of rock get affected by solution the most?

Answer 9

Chalk and limestone.

Question 10

Name four ways rocks can get transported

Answer 10

Traction, Suspension, Saltation and Solution

Question 11

Define Traction

Answer 11

Large particles like boulders roll along the river bed

Question 12

Define Suspension

Answer 12

Very light small particles like silt get carried along by the water

Question 13

Define Saltation

Answer 13

Pebbles bounce along the river bed

Question 14

Define Solution (in transport)

Answer 14

Soluble materials dissolve and are carried along.

Question 15

Name two types of erosion

Answer 15

Lateral Erosion and Vertical Erosion

Question 16

Define lateral erosion

Answer 16

It widens the river valley and channel. It is dominant in the middle and lower courses. It acts horizontally

Question 17

Define vertical erosion

Answer 17

This deepens the river valley and channel making it v-shaped. It is dominant in the upper course of the river.

Question 18

Define Head ward Erosion

Answer 18

It is the process by which the water erodes upstream, lengthening the river valley.

Question 19

Define Fluvial Erosion

Answer 19

The process in which material gets detached from the riverbed and sides.