Lesson 3 The Rhine

• Aardrijkskunde
• Middelbare school
• havo, vwo
• Leerjaar 2

Lesson 3

Erosion

At the end of the lesson you can ...

1. Explain what erosion is.
2. Explain the difference between a U valley and a V valley. 
3. Explain the three forces responsible for erosion. 
4. Name different characteristics of different mountain ranges. 

HW

What two types of weathering are there?

What three types of mechanical weathering are there.

Explain how chemical weathering takes place.

Braindump

Write down all the important keyterms you have learned that you can link with the following image.

Rocks are being moved

• Weathered material is carried away by rivers, glaciers and by the wind.
• In this process, erosion occurs.

Erosion

• = the wearing away of rock under the influence of water, ice or by the action of wind, moving the rock. 
• The big difference between weathering and erosion is that erosion always involves a transport agent.

Erosion by rivers

• Weathering material enters rivers. 
• Rocks collide and rub against each other. 
• Pieces break off. 
• Stones are rounded off. 

But also ...

But also ...

Erosion by ice

• Glacier: packs of ice sometimes hundreds of metres thick. 
• High in the mountains; precipitation falls as snow. 
• New snow compresses and
  becomes ice: firn.
• Carried material is sedimented
  --> terminal moraine. 

PIF

Precipation: water that falls from the clouds towards the ground, especially as rain or snow.<br><br>Sedimentation: a natural process in which rock is formed from small pieces of sand, stone, etc. that have been left by water, ice, or wind :

Valleys

• A river valley has a V-shape and a glacial valley has a U-shape.

?

?

Glacial valley

River valley

Worksheet valleys

• Make the worksheet about U- and V-valleys. 
• Talk softly with your neighbour buddy. 
• Raise your finger if you have a question.
• Finished? Read and mark the important parts of lesson 3.

Erosion by wind

PIF

Scour: rubbing an object hard with something rough.

Landscape cycle

= the whole process of weathering, erosion and sedimentation. 

Relief

• Variations in height = relief
• Lowlands = 0-200 meter
  
• Hill country = 200-500 meter
  
• Low mountain range = 500-1500 meter
  
• High mountain range = 1500 meter and
  higher
  

What relief are these mountains?

Mountain ranges

• Mountains with a lot of relief and high, sharp peaks --> young mountain ranges
• Mountains with little relief and low, round tops --> old mountain ranges

Young or old mountain?

Young or old mountain?

Young or old mountain?

Young or old mountain?

Young or old mountain?

Young or old mountain?

Young or old mountain?

Young or old mountain?

Young or old mountain?

Get to work!

1. Read lesson 3 completely
2. Mark all the important sentences
   
3. A/G: Make exercises 1, 2, 3, 4, 5 & 6
   H: Make exercises 1, 2a, 2b, 2c, 4, 5 & 6
   M: 1, 2a, 2b, 2c, 4, 5b, 5c, 5d & 6
4. Done? Make the questions from the video / Read and mark L4 / Start preparing for the test / Do something for another subject

00:00

What are the primary ways rivers shape the landscape?

02:16

What characteristics define the upper course of a river, as exemplified by the Zambezi River?

04:30

How do meanders form, and what can they evolve into over time?

06:43

What processes are predominant in the lower course of a river, and what landforms can result?

09:00

How do human activities influence river systems and their natural processes?

At the end of the lesson you can ...

1. Explain what erosion is.
2. Explain the difference between a U valley and a V valley. 
3. Explain the three forces responsible for erosion. 
4. Name different characteristics of different mountain ranges. 

What is erosion?

What three transport agents cause erosion?

What is the difference between a U and V-valley?

What reliefs are there? Name + heights

What is the difference between an old and a young mountain range?