What’s for starters?

River MouthClick to reveal answer / Click back icon to return

WatershedClick to reveal answer / Click back icon to return

TributaryClick to reveal answer / Click back icon to return

ConfluenceClick to reveal answer / Click back icon to return

River SourceClick to reveal answer / Click back icon to return

What is today’s lesson objective?

To identify the river processes that take place in a channel

Students note in planners

How will I achieve today’s lesson objective?

You must:• Be able to identify the 3 river processes

You should:• Be able to describe and explain at least 2

ways a river erodes & transports material.You could:

• Be able to confidently describe and explain all river processes; and link types of erosion to types of transportation

What processes operate in a river system?

Students write title in exercise book / Click video for Clip bank – Upper Tees then sticky for review of processes in more detail

How will I achieve today’s lesson objective?

You must:• Be able to identify the 3 river processesWeathering, Erosion and Mass Movement.

You should:• Be able to describe and explain at least 2

ways a river erodes & transports material.You could:

• Be able to confidently describe and explain all river processes; and link types of erosion to types of transportation

What are the processes of Erosion?

Students write title / Dist erosion ws

Processes of river erosion

Study this photo.

How do you think this river can erode the landscape?

Erosion is the wearing away of the land.

Students note definition of erosion on their glossary

Processes of river erosion

Hydraulic action

Attrition

Corrosion

Abrasion

Demo with stones or click sticky

Students read definition of type & draw Diag to remember / Click to reveal prompt drawings

Definitions

Hydraulic ActionThis process involves the force of water against the bed and banks.

Abrasion/CorrasionThis is the process by which the bed and banks are worn down by the river’s load. The river throws these particles against the bed and banks, sometimes at high velocity.

AttritionMaterial (the load) carried by the river bump into each other and so are smoothed and broken down into smaller particles.

CorrosionThis is the chemical action of river water. The acids in the water slowly dissolve the bed and the banks.

Do you know your processes of erosion?

What are the processes of Transportation?

Students write title / Dist erosion ws

How is material transported downstream?

Saltation

Solution

Traction

Suspension

Boulders and pebbles are rolled along the river bed at times of high discharge.

Sand sized particles are bounced along the river bed by the flow of water.

Fine clay and sand particles are carried along within the water even at low discharges.

Some minerals dissolve in water such as calcium carbonate. This requires very little energy.

How is material transported downstream?

Do you know the difference between erosion and transport?

How is material transported downstream?

How is material transported downstream?

Students identify & write their own definitions on the worksheet / Discuss & link transportation to erosion e.g.Attrition with Traction & SatltationStudents make the links on the erosion / transportation sheets

Do you know the difference between erosion and transport?

What is the process of Deposition?

Students write title

Deposition takes place when the river loses its energy. This may happen because:

- In shallow waters, more water is in contact with the bed or banks of the river, increasing friction and reducing velocity (speed of the water)

- When the river meets the sea or lake

Students note on their glossary

The River Conwy has deposited material in this section of its course. Suggest reasons why this has happened.

Deposition

Students write answer in the back of their exercise book. Allow 3 mins

How will I achieve today’s lesson objective?

You must:• Be able to identify the 3 river processes

You should:• Be able to describe and explain at least 2

ways a river erodes & transports material.You could:

• Be able to confidently describe and explain all river processes; and link types of erosion to types of transportation

Plenary

Bingo!Instructions:• In the back of your exercise

book create a grid like the one opposite

• Choose key words from the list below

• Write the key word numbers randomly in your grid

Key words:1. Erosion2. Transportation 3. Deposition4. Hydraulic Action5. Attrition6. Abrasion7. Corrosion8. Traction9. Saltation10.Suspension11.Solution

What was today’s lesson objective?

To identify the river processes that take place in a channel

Students note in planners

How did I achieve today’s lesson objective?

You must:• Be able to identify the 3 river processes

You should:• Be able to describe and explain at least 2

ways a river erodes & transports material.You could:

• Be able to confidently describe and explain all river processes; and link types of erosion to types of transportation

Foggy?, Misty?, Clear?