Glacial erosion: Valley landforms

KQs: How are glaciated valleys different from river valleys? When, where and why do glaciers deposit their loads?

Terms:
U-shaped valley
truncated spurs
hanging valley

Starter: Test of previous learning (here)
Main: Work with learning partners to investigate the following questions:

What are the main features of a glaciated valley?

How are glaciated valleys different from river valleys and what makes them that way?

How do truncated spurs and hanging valleys form?

 

What evidence can be found on an OS map to support the existence of glaciated valleys?

Your Learning Path for this series of progress points is located here

Glacial Erosion: Aretes & Pyramidal Peaks

Key Questions:

Why are all high mountain peaks knife-edged and sharp? What allows glacial erosion features to be identified in photographs and maps?

Terms:

·         Aretes

·         Pyramidal Peaks

·         Infer

Starter:

Video: Landforms of upland glaciation in Loch Lomond

http://www.bbc.co.uk/learningzone/clips/landforms-of-upland-glaciation-in-loch-lomond/1140.html

Tasks:

·         TDQT

·         Using H p103 and/or p259-261, add the 1^st 2 key terms above to your ‘Glaciation’ glossary and write a meaning for them.

·         Using the diagram on the board and what you learned from the video clip, explain the formation of an arête and pyramidal peak. It is essential that you use at least one diagram to help you to do this.

·         Complete activity 1(a) from H p103

Exam Tip:

Evidence – refers to features, what you can see, what symbols represent and what you can ‘infer’ from a source

Plenary:

D/E: What are arêtes and pyramidal peaks?

C: Why are all high mountain peaks knife-edged and sharp?

B: What allows glacial erosion features to be identified in photographs and maps?

A: Why are glaciated areas often uninhabited, but popular with visitors?

Glacial Erosion: Corries

Key Question:

How do corries form?

Terms:

·         Corrie

·         Cirque

·         Tarn

Starter:

Video: Landforms of upland glaciation in Loch Lomond

http://www.bbc.co.uk/learningzone/clips/landforms-of-upland-glaciation-in-loch-lomond/1140.html

Tasks:

·         TDQT

·         Using H p102 and/or p259-261, add the key terms above to your ‘Glaciation’ glossary and write a meaning for them.

·         Using H p102 and what you learned from the video clip, explain the formation of a corrie. It is essential that you use at least one diagram to help you to do this.

·         Complete activity 1(a) from H p103

Exam Tip:

Describe fully means to do more than list what you can see. You must use place names, link evidence from sources, and ‘paint a picture’ for the reader (ideally using similes).

Plenary:

D/E: What is a corrie?

C: Describe the main features of a corrie (using evidence from a photo or OS map).

B: Explain the formation of a corrie.

Is there evidence to show that valley glaciers are shrinking?

Key Ideas:

·         Investigation of an issue has to be supported by evidence and counter arguments should be considered.

·         Changes occur over time and may be due to human interference

Terms:

·         Valley glacier

·         Receding

·         Investigation

·         Counter argument

·         Evidence

Starter:

Introduction to the process of investigation

Tasks:

·         Research the investigation question using http://www.bbc.co.uk/science/earth/water_and_ice/glacier as a starting point

·         View the video at http://www.bbc.co.uk/news/world-south-asia-15216875

·         Produce a single sided sheet to show your findings from the investigation

Student investigation result

Vanishing glaciers by Beth

View more presentations from ckzebra.

Glacial Erosion

Key Ideas:

·         There are two main processes of glacial erosion: Abrasion and Plucking, plus one main type of weathering: Freeze-thaw

·         Valley glaciers are more effective at erosion than ice sheets.

Terms:

·         Erosion

·         Abrasion

·         Plucking

·         Freeze-thaw weathering

·         Valley glaciers

·         Ice sheets

Starter:

Revision/completion of work from last lesson

Tasks:

·         Using H p100-101, complete task 2 from p101. Take about ½ side of your book for each diagram.

·         On a separate page start a Glaciation Glossary

This should be a list of words/phrases and their meaning that we cover in this topic and updated each lesson.

The words/phrases you should have listed/defined by the end of the lesson is below (use H p100-101, the glossary on p259-261 and your own knowledge to write the meanings):

·         Glaciation

·         Glacier

·         Valley glacier

·         Ice sheet

·         Pleistocene ice age

·         Snow line

·         Glacial erosion

·         Abrasion

·         Plucking

Freeze-thaw weathering

The last ice age and glacial ice today

Key ideas

1. The last Ice Age (Pleistocene) covered a significant time scale and ended around 10,000 years ago.
2. The  ice cover in the northern hemisphere at that time spread well into continental Europe and where is now the USA.
3. There are two main types of ice coverage

Terms

Pleistocene, valley glacier, ice sheet, snow line, erosion, deposition

Activities

Using p100 in H, investigate the following:

1. How does ice form from snow?
2. What is ice called when it moves on a large scale?
3. When did the Pleistocene Ice Age begin and end?
4. How much of the earth's surface did it cover?
5. What was the extent of it's coverage?
6. What was the coverage in the UK?
7. Describe the scene if you had been around in the Hetton area 18,000 years ago.
8. What is the 'snow line'?
9. What is the landform evidence of glacial erosion and deposition in the UK?
10. What is a valley glacier?
11. Name an example of a valley glacier and the mountain range it is located in.
12. What is an ice sheet?
13. Where do they exist now?

Introduction to Ice on the Land

Key Ideas: 

1. A glacier is a mass of ice that moves very slowly downhill. They are found at high altitude across the globe, even on high mountains close to the equator, and at lower altitude in high latitudes close to the North and South Poles. The formation of glaciers and the process by which they shape the landscape around them is called glaciation.

Terms:

Glacier, glaciation, altitude, landscape


Starter

Welcome back

Main

1. TDIT
2. Watch videos and view revision materials using link below.

http://www.bbc.co.uk/schools/gcsebitesize/geography/glacial_landscapes/

Plenary

Complete self assessment sheet