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Class B1L - The creation of U-shaped valleys and V-shaped valleys

Shaping landscapes: 
U-shaped valleys and V-shaped valleys
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volgende
Slide 1: Tekstslide
AardrijkskundeMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 27 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 30 min

Onderdelen in deze les

Shaping landscapes: 
U-shaped valleys and V-shaped valleys

Slide 1 - Tekstslide

Learning objectives
After this lesson you can:
  
  • describe in your own words how glaciers shape a landscape;
  • name 5 glacial erosional landforms;
  • name the erosive process that creates U-shaped valleys;
  • name 1 depositional landform created by glaciers;
  • name the erosive process that creates V-shaped valleys;
  • name 1 distinctive feature of both a U-shaped valley and a V-shaped valley;
  • recognise on a picture or in real life when travelling abroad if a valley was created by a glacier or by a river.

Slide 2 - Tekstslide

Flashback:
What two kinds of forces shape the landscape on Earth?

Slide 3 - Open vraag

Flashback: endogenous or exogenous forces at work?

Slide 4 - Tekstslide

Flashback: endogenous or exogenous forces at work?

Slide 5 - Tekstslide

Flashback: endogenous or exogenous forces at work?

Slide 6 - Tekstslide

Glacial erosional landforms

Slide 7 - Tekstslide

How glaciers shape the landscape
  • Plucking: rocks pulled off and carried away by the ice.

  • Abrasion: grinding like sandpaper.

Slide 8 - Tekstslide

Depositional landforms created by glaciers
  • Deposition: putting down rocks and sediment.

  • Moraines.

  • Also visible after glacier has melted away.

Slide 9 - Tekstslide

Leftover from a retreating glacier: U-shaped valley
  • Hanging valleys

  • Steep valley walls

Slide 10 - Tekstslide

Example of a U-shaped valley: 
Yosemite Valley, Yosemite National Park, USA

Slide 11 - Tekstslide

Example of a U-shaped valley: 
Yosemite Valley, Yosemite National Park, USA

Slide 12 - Tekstslide

Flashback: endogenous or exogenous forces at work?

Slide 13 - Tekstslide

How rivers shape the landscape
  • Water erodes river bed and river banks.

  • Rivers flow faster in the upper river course, close to their source.

  • High bedload transport in upper river course.

  • V-shaped valleys can be found in the upper river course.

Slide 14 - Tekstslide

How rivers deposit sediment
Boulders
Pebbles
Coarse sand
(Fine) sand
Silt

Slide 15 - Tekstslide

Flashback:
Rivers can erode rock. How do we call this type of erosion?

Slide 16 - Open vraag

How fluvial erosion leads to a V-shaped valley

Slide 17 - Tekstslide

Formed by a river: V-shaped valley
  • Valley walls are usually less steep compared to U-shaped valleys.

  • Harder rock → steeper valley walls.

Slide 18 - Tekstslide

Example of a V-shaped valley: 
Grand Canyon of the Yellowstone, USA

Slide 19 - Tekstslide

What is the starting point of a glacier?
A
arête
B
hanging valley
C
cirque
D
pyramidal peak

Slide 20 - Quizvraag

How do we call the scraping of rocks along the bottom and sides of a glacier?
A
abrasion
B
plucking
C
ice flow
D
deposition

Slide 21 - Quizvraag

True or false:
Tributary glaciers erode smaller valleys than trunk glaciers.
A
true
B
false

Slide 22 - Quizvraag

Tributary glacier
Cirque
Arête
Terminal moraine
Trunk glacier

Slide 23 - Sleepvraag

True or false:
Rivers deposit more sediment in the upper course than in the lower course.
A
true
B
false

Slide 24 - Quizvraag

Which statement about V-shaped valleys is correct?
A
If the rocks are soft and easy to erode by a river, then the walls of the valley become very steep.
B
Hanging valleys are distinctive features of V-shaped valleys.
C
V-shaped valleys are primarily formed in the middle course of rivers.
D
A V-shaped valley is formed when the sides of the valley break off due to mechanical weathering and mass movement.

Slide 25 - Quizvraag

What kind of valley do you see here?
A
U-shaped valley
B
V-shaped valley

Slide 26 - Quizvraag

What did you learn from this lesson that you did not know before?

Slide 27 - Woordweb