Lesson 3 The Rhine

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

Lesson 3

Erosion

Goals

1. Students can explain what erosion is and how it affects nature.
2. Students  can explain how weathering material is transported and by what transport agents.
3. Students can explain the landscape cycle in their own words.
4. Students know what different types of relief there are.
5. Students can explain what young and old mountains are and how we can recognise these.

2N:

1. Read lesson 2 completely.
   
2. Mark all the important sentences
   
3. Make exercises 1a, 2b, 3a, 3c, 3d, 4, 5

2H & 2G:

1. Read lesson 2 completely.
   
2. Mark all the important sentences
   
3. Make exercises 1, 2a, 2b & 3a, 3c & 3d, 4a, 5 & 6a.

Recap

1. Students know how the alps are formed.
   
2. Students know what weathering is.
   
3. Students know different types of weathering and can explain the difference.

Rocks are being moved

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

1. Water
2. Ice
   
3. Wind
   

Erosion

• = When a transport agent carries stones along with it and wears away the rock or landscape.
• The big difference between weathering and erosion is that erosion always involves a transport agent.

Valleys

•  If this erosion continues for millions of years it can create valleys.
• A river valley has a V-shape and a glacial valley has a U-shape.

?

?

Glacial valley

River valley

Weathering and erosion

• Weathering and erosion cause the solid rock to continue to disintegrate.
• Put the following soil types in the correct order from coarse to fine:

1. Clay
2. Sand
3. Gravel
4. Rocks

Erosion at a glacier site

•  When a new layer of snow falls each year and doesn’t melt away, the snow will accumulate. --> firn basins
• The weight of all the firn causes the glacier to slowly flow down from the firn basin (glacier ice is plastic/bendable),
• scraping across the bottom and along the sides
• --> Erosion

Landscape cycle

Get to work!

1. Read lesson 3 up to 'Relief'
2. Mark all the important sentences
   
3. 2N: Make exercises 1, 3, 4 & 5
   2H/2G: Make exercises 1, 4 & 5

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 crumble and wear away through
  weathering and erosion.
• We have young and old 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?

Get to work!

1. Read lesson 3 completely
2. Mark all the important sentences
   
3. 2N: Make exercises 1, 2, 3, 4, 5 & 6
   2H/2G: Make exercises 1, 2a, 2b, 2c, 4, 5 & 6

Goals

1. Students can explain what erosion is and how it affects nature.
2. Students  can explain how weathering material is transported and by what transport agents.
3. Students can explain the landscape cycle in their own words.
4. Students know what different types of relief there are.
5. Students can explain what young and old mountains are and how we can recognise these.