WJEC A-Level Geography 601-8455-3
Coastal Landscapes
Glaciated Landscapes
Tectonic Hazards
Changing Places
Water and Carbon Cycles
Global Migration
Global Governance of the Oceans
EcosystemsContemporary theme
Economic Growth and Challenge: IndiaContemporary theme
Economic Growth and Challenge: ChinaContemporary theme
Development in an African ContextContemporary theme
Energy Challenges and DilemmasContemporary theme
Weather and ClimateContemporary theme
Fieldwork and Geographical Skills
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.
What is the Quaternary Ice Age, and roughly when did it begin?
Define a glacial period.
Questions from this subtopic
Each one with the model answer underneath.
- 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
Define a glacial period.
Model answer
A glacial is a colder phase within an ice age during which ice sheets and glaciers expand.
- 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
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
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
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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