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River Key Terms: Processes

Total questions: 12

Worksheet time: 6mins

Name
Class
Date
1.

Which type of erosion occurs when water and air are forced under pressure into small gaps in the river bed. When the pressure is released they expand, cracking the rock.

a)

Hydraulic action

b)

Abrasion

c)

Attrition

d)

Solution

2.

Which type of erosion occurs when bedload is scraped along the river bed and channel in a sandpaper-like action?

a)

Abrasion

b)

Hydraulic action

c)

Attrition

d)

Solution

3.

Which type of erosion is also known as corrosion?

a)

Abrasion

b)

Solution

c)

Hydraulic action

d)

Attrition

4.

Which type of erosion has no direct impact on the river land features as it involves bedload hitting each other to become smaller, smoother and rounder

a)

Attrition

b)

Corrasion

c)

Hydraulic action

d)

Corrosion

5.

Which type of transportation occurs when large boulders are rolled across the river bed because they are too heavy to be lifted?

a)

Traction

b)

Saltation

c)

Solution

d)

Suspension

6.

Which type of transportation occurs when pebbles appear to be playing leapfrog as they are picked up and dropped by the river current?

a)

Traction

b)

Suspension

c)

Solution

d)

Saltation

7.

Which type of transportation is invisible to the naked eye as it involves elements such as iron and magnesium being dissolved in water?

a)

Solution

b)

Suspension

c)

Traction

d)

Saltation

8.

Which type of transportation involves small visible particles being carried in the river's current as they are light?

a)

Suspension

b)

Solution

c)

Saltation

d)

Traction

9.

What is the proper term for the river dropping it's load when it loses the energy to transport it?

a)

Deposition

b)

Deposation

c)

Deposetion

d)

Depossition

10.

Which is greater in the LOWER sections of a river's long profile?

a)

Angle of gradient

b)

Size of bedload particles

c)

Channel bed roughness

d)

Quantity of discharge

11.

Which is greater in the UPPER sections of a river's long profile?

a)

Channel depth

b)

Bedload quantity

c)

Average velocity

d)

Angle of gradient

12.

What % of a river's energy is lost to friction on average?

a)

95%

b)

85%

c)

75%

d)

65%