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Glaciated Landscapes

The glacier as an open system

  • 3 things to know
  • AS Unit 1

Overview

Four components used to describe a glacier as a system, three outputs from a glacial system and main store within a glacial system.

What you need to know

Answer each one before you reveal it.

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Key term

Name the four components used to describe a glacier as a system.

Key term

Give three inputs to a glacial system.

Key term

Name three outputs from a glacial system.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Name the four components used to describe a glacier as a system.

    Model answer

    Inputs, outputs, stores and transfers.

  2. 2

    Give three inputs to a glacial system.

    Model answer

    Snowfall, avalanched snow and ice from the slopes above, and solar energy, with rock debris entering as a material input.

  3. 3

    Name three outputs from a glacial system.

    Model answer

    Meltwater, water lost by evaporation and sublimation, and ice lost by calving into a lake or the sea.

  4. 4

    What is the main store within a glacial system?

    Model answer

    The ice itself, together with the snow of the accumulation zone and the debris held within and beneath the ice.

  5. 5

    Define accumulation in a glacial system.

    Model answer

    Accumulation is the total gain of snow and ice by a glacier over a period.

  6. 6

    Define ablation in a glacial system.

    Model answer

    Ablation is the total loss of snow and ice by a glacier through melting, sublimation, evaporation and calving.

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