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Glaciated Landscapes

Climate change and the glacier budget

  • 3 things to know
  • AS Unit 1

Overview

Quaternary Ice Age, glacial period and three Milankovitch cycles.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Key term

Name the three Milankovitch cycles.

Numbers

What is the Quaternary Ice Age, and roughly when did it begin?

Key term

Define a glacial period.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is the Quaternary Ice Age, and roughly when did it begin?

    Model answer

    The Quaternary is the current geological period of repeated glaciations, and it began about 2.6 million years ago.

  2. 2

    Define a glacial period.

    Model answer

    A glacial is a colder phase within an ice age during which ice sheets and glaciers expand.

  3. 3

    Define an interglacial period.

    Model answer

    An interglacial is a warmer phase within an ice age during which ice retreats and temperate conditions return.

  4. 4

    What is a stadial?

    Model answer

    A stadial is a shorter, colder pulse within an interglacial or at the close of a glacial, during which ice readvances.

  5. 5

    What is an interstadial?

    Model answer

    An interstadial is a short, warmer pulse within a glacial period, too brief for full interglacial conditions to develop.

  6. 6

    Name the three Milankovitch cycles.

    Model answer

    Eccentricity, the shape of the Earth's orbit; obliquity, the tilt of its axis; and precession, the wobble of that axis.

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AFew coastal people recognised the signs.
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The Mariana Trench reaches almost 11,000 m below sea level.
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