River Processes

What are three things that rivers do naturally?

• a.erode, transport, and deposit
• b. dissolve, precipitate, sublime
• c. evaporate, percolate, infiltrate
• d.none of these

The diagram shows the river process of erosion. In a fast-flowing rive, water is forced into cracks in the bank. Over time this breaks the bank up. It is called _______________ .

• Attrition

• Hydraulic action

• Solution

• Abrasion

In the process of river transport, when small stones and pebbles are leaped or skipped along by the river current, this is called _____________ .

• Suspension

• Solution

• Saltation

• Traction

In the last river process of deposition, boulders, cobbles, pebbles, sand, silt and clay are deposited in that order because ____________________

• it is in alphabetical order, and they have to follow their turn when getting of the river transporter.

• bigger stones are less heavy than smaller pebbles

• the river transporter has had enough of these hard cases.

• the heaviest material are deposited out first, followed by the less heavy material and lastly the lightest material.

Looking at the long profile of the river's course, where does most erosion occur?

• Upper course

• Middle course

• Lower course

• The mouth

In the river process, ___________ is when material is worn away from the river bed and banks.

• transport

• deposition

• erosion

In the river process, __________ is when material is dropped into the river channel.

• Deposition

• Erosion

• Transport

Looking at the river process of transport, when soluble material and minerals are dissolved into the water and carried along, this is called _______________ .

• Saltation

• Solution

• Traction

• Suspension

In the river process of erosion, when rocks and stones in the water act like sandpaper and scrape the river bed and bank, wearing them away, this is called ____________ .

• Solution

• Attrition

• Hydraulic action

• Abrasion

When the river reaches flatter land, it loses energy. So it drops or deposits its load. The deposited material is called ___________ .

• Sediment

• Solution

• Suspension