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      Lesson details

      Learning outcome

      I understand how glaciers shape the landscape through erosion and I can identify and describe key glacial landforms.

      Key learning points

      1. Glaciers create wide U-shaped valleys through the process of erosion.
      2. Truncated spurs are formed when a glacier cuts off interlocking spurs.
      3. Corries are bowl-shaped hollows found on the side of hills and mountains.
      4. Aretes are sharp peaks formed by two glaciers wearing down either side of a mountain.

      Keywords

      • Corrie - a steep-sided hollow at the head of a valley or on a mountainside

      • Truncated spur - a ridge that ends in a steep cliff face where an interlocking spur formed by rivers has been cut off by a glacier

      • Arete - a narrow ridge of rock between two valleys

      • U-shaped valley - a valley with steep, straight sides and a flat bottom, formed by the movement and scouring action of a glacier

      Common misconception

      Truncated spurs are created soley by glaciers.

      Truncated spurs started as interlocking spurs which are a fluvial feature formed by rivers. Glaciers then modify this landform through erosion.

      Teacher tip

      Explore glacial features found in the Lake District and around the globe using Google Earth.

      Licence

      This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      What is a glacier?

      A frozen river
      A deep lake
      Correct answer: A large mass of ice that moves over land
      A type of snowstorm

      Q2.
      Where are most glaciers found?

      Deserts
      Correct answer: Mountains and polar regions
      Rainforests
      Beaches

      Q3.
      How do glaciers form?

      Correct answer: From layers of snow compacting over time
      From rivers freezing overnight
      From melted ice refreezing every year

      Q4.
      What is abrasion?

      Correct answer: When rocks and ice scrape the rock beneath the glacier as it moves
      When ice melts quickly
      When glaciers drop large rocks
      When snow turns into ice

      Q5.
      What type of environment do glaciers form in?

      Warm deserts
      Tropical rainforests
      Correct answer: Cold, high-altitude, or polar environments

      Q6.
      Where are most of the world's glaciers located?

      Near the equator
      Correct answer: Polar regions (Antarctica and Greenland)
      The Sahara Desert

      4 Questions

      Q1.
      What type of valley do glaciers create?

      V-shaped valley
      Flat valley
      Correct answer: U-shaped valley

      Q2.
      What is a corrie?

      A ridge between two valleys
      Correct answer: A bowl-shaped hollow where glaciers form
      A frozen river

      Q3.
      What is an arĂȘte?

      Correct answer: A sharp ridge between two glacial valleys
      A deep lake
      A flat-topped mountain

      Q4.
      What is a truncated spur?

      A river that freezes in winter
      A small hill formed by ice deposits
      A sharp mountain peak
      Correct answer: A steep cliff or ridge cut off by a glacier

      To help you plan your 9 geography lesson on: Glacial landforms, download all teaching resources for free and adapt to suit your pupils' needs...