River Process

Question 1

What are the FOUR processes of erosion?

Explain them.

Answer 1

Abrasion - sand and stones carried by the river scrape the banks and bed eroding them.
Attrition - stones and pebbles bounce off each other as they are carried along eroding them.
Solution - water is slightly acidic which means some materials are corroded by water and dissolve into it.
Hydraulic action - fast forcing water forces its way into cracks in the banks causing the cracks to expand and erode in the bank.

Question 2

What are the FOUR methods of transport?

Explain them.

Answer 2

Suspension - small light parts of rock and soil that are carried along by the river. They make the water look cloudy or muddy.
Solution - Dissolved material that is carried along by the river, you can’t see it.
Saltation - sand grains and small rocks/stones bounce along.
Traction - large stones/rocks get rolled along.

Question 3

List the methods of transport in order from least to most energy.

Answer 3

Solution
Suspension
Saltation
Traction

Question 4

The ___________ it flows, the ___________ water it has, the larger the load the river can carry.

Answer 4

Faster
More
Larger

Question 5

The ___________ it flows, the more material it deposits.

Answer 5

Slower.