1.3 Rock is moved

• Aardrijkskunde
• Middelbare school
• vmbo t, mavo, havo, vwo
• Leerjaar 2

1.3 Rock is moved

Part 1

Learning goals

- you know what mass movement is.

- you understand the role erosion plays in changing the landscape in mountain ranges and recognise river and glacier valleys.

- you can explain the differences between river gravel, sand and clay.

Grab your notebook and go to the assignments side.

What do you see in the picture?

Try to explain each concept.

A glacier is wide and therefore also erodes a wide valley. The valley takes the shape of a U; a U-valley.

Different with a river, which makes a much narrower valley: a V-valley.

U-Valley:

Formed by glaciers.

Erosion side and bottom.

V-Valley:

Formed by rivers.

Erosion at the bottom (fastest current).

U or V?

V-dal

U-dal

U or V?

U-dal

V-dal

U or V?

V-dal

U-dal

Falling Rocks

Mass movements due to gravity

Mass movement

Mass movements:

Weathered material moves down a slope.

Material can roll, slide and fall.

Type of movement depends on:

1. How steep the slope is.

2. The size of the rock

Make ex 2

1.3 Rock is moved

Part 2

Learning goals

- you know what mass movement is.

- you understand the role erosion plays in changing the landscape in mountain ranges and recognise river and glacier valleys.

- you can explain the differences between river gravel, sand an clay.

Erosion + from gravel to clay

Erosion affects, among other things, stones

Weathering and erosion cause the solid rock to fall apart further and further

Set the soil types from coarse to fine

Coarse

-----

-----

-----

-----

Fine

---->

Clay

Sand

Gravel

Rocks

Solid rock

Gravel

Clay

Sand

Rocks

Solid Rocks

What is a glacier?

1. ice mass that scours out a valley
2. ice mass that scours out a v valley
3. A mountain thing
4. ice mass in high mountains that slowly moves

What is gravel?

1. rounded stones due to the erosion of a river
2. the smallest grains

An exogenous force is erosion, what is needed for erosion?

1. Wind, water or ice
2. Material in wind water or ice
3. High temperatures
4. Stone

With erosion

1. rock falls apart into small chunks
2. weathering material is carried away by wind, water or ice due to an abrasive action
3. dissolves rock in water or acids
4. rock is left behind and accumulates

What are glaciers?

1. Snow that never melts
2. a mass of ice that moves
3. The mountain peaks
4. a licked soft ice cream cone

Make ex

1, 3, 5 and 6