CH5.1-2 recap

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

Welcome

Learning goals

Recap

Questions

Learning

Learning goals

− You know which forms of weathering there are.

− You understand how ice, plant roots and changes in temperature cause weathering.

− You know the types of weathered material are and how they differ in size.

− You understand how the transport of weathered material can cause erosion.

Learning goals

− You know in which ways weathered material can be moved.

− You understand why a river is better at sorting weathered material than a glacier, and the wind can do it even better.

− You understand why there is much sediment at the end of a glacier.

Weathering is the break down of hard rock. The two types are ...... and ........ weathering

1. physical - eroded
2. physical - mechanical
3. chemical - non chemical
4. mechanical - chemical

Circumstances in which chemical weathering occurs

1. hot and humid climate
2. large temperature amplitude
3. hot and dry climate
4. Extremely cold winters

Circumstances in which mechanical weathering may occur.

1. Mediterranean climate
2. Hot and humid climate
3. Extreme temperature differences
4. A moderate maritime climate

Middle reaches

Higher reaches 

Lower reaches 

Sand 

Clay

Rocks

Gravel

Erosion

Weathering

Sedimentation

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

Sleep het juiste begrip naar de juiste afbeelding

Chemical weathering

Oxidation

Temperature fluctuations 

Mechanical weathering: Frost

Mechanical weathering

Weathered material

The river brings material from the higher reaches to the middle and lower reaches. 

This material decreases in size the further you go.

Boulders, rocks, gravel, sand, clay. 

Erosion

Rivers grind away the landscape. The weathered material in rivers bumbs into the sides and scrapes the sides away, like sandpaper does.

Erosion

Erosion

Erosion

Sedimentation

Sedimentation

Sedimentation

Explain in your own words the difference between Erosion and weathering

Erosion

Weathering

Weathering

Erosion

Sedimentation

Erosion can happen without weathering

1. yes
2. no

Weathering can happen without erosion

1. yes
2. no

Weathering due to water freezing in the cracks of the stone is called

1. biological weathering
2. frost weathering
3. chemical weathering
4. weathering due to the temperature of stone

Make the correct combinations:

Erosion

Transportation

Deposition

The glacier makes a U-shaped valley

The glacier brought rocks from Scandinavia to The Netherlands

The glacier picks up rocks

The glacier melts and leaves rocks behind

Rocks in the glacier scrapes away rocks below the glacier

The glacier moves and there are rocks inside the glacier

The water flow is the fastest in

1. the upper course
2. the middle course
3. the lower course

Sedimentation of sand is happening in the

1. upper course
2. middle course
3. lower course

Erosion because of a glacier forms a

1. U-valley
2. V-valley
3. Meanders

Mechenical weathering

chemical weathering

Cold climates

warm climates

Lots of precipitation needed

some precipitation is enough

Closer to the poles

closer to the equator

Erosion

Weathering

Chemical weathering

Mechanical weathering

This picture is taken in Canada. Explain how this landscape is formed. Use the words 'erosion' and 'weathering'.

2 hoofdsoorten verwering.

Elke hoofdsoort kent weer verschillende voorbeelden.

Chemische verwering

Het gesteente valt uit elkaar doordat de chemische structuur verandert.

Waardoor: 

- Oplossen van gesteenten in zuur (grond/regen)water

Fysische verwering

(mechanische verwering)

Het gesteente valt uit elkaar, maar behoudt de zelfde structuur.

Waardoor:

- grote temperatuurverschillen,

- vorst

- wortels van planten

- plotseling drukverschil

Erosion

Weathering

Sedimentation

Weathering and mountains

In combination with erosion

	Young mountain	Old mountain
Example	Alps	Jura
Height	High	Low
Top	Pointy	Flat
Hills	High	Flat

1. Young Mountain
2. Old mountain

1. Erosion
2. Sedimentation
3. Weathering

1. Erosion
2. Weathering
3. Sedimentation

1. Erosion
2. Sedimentation
3. Weathering

1. Erosion
2. Sedimentation
3. Weathering