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?