Volcanoes · 2021. 5. 7. · Boardworks Ltd Subject: KS3 Geography Created Date: 5/7/2021 4:39:44...
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Transcript of Volcanoes · 2021. 5. 7. · Boardworks Ltd Subject: KS3 Geography Created Date: 5/7/2021 4:39:44...
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For more detailed instructions, see the Getting Started presentation.
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Volcanoes
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Active volcano – liable to erupt e.g. Mt Etna.
Dormant (sleeping) volcano – a volcano which
has not erupted for many years. For example, Mt
Pinatubo erupted in 1991 after 500 years of
dormancy.
Extinct volcano – a volcano which has not
erupted for many thousands or millions of years
e.g. Edinburgh.
However, it is often very difficult to tell whether a volcano
will erupt again…El Chichon, Mexico erupted in 1982
after being dormant for approximately 1200 years!
Do all volcanoes erupt?
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Volcanic bombs,
ash, lava, gases
Magma chamber
Parasitic cone
Crater
Main vent
Label this cross section of a volcano
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CraterVolcanic
bombs, ash
and gases
Main vent
Parasitic
cone
Magma
chamber
Cross section of a volcano
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Cross section of a volcano
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Volcanic emissions
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Why do volcanoes have different shapes?
Volcano shapes
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Volcano shapes
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Volcanic activity at plate margins
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Around which plate do we find most volcanoes?
Where are volcanoes found?
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The Hawaiian islands are a chain
of volcanoes in the Pacific Ocean.
Look at their location on the map below.
Why is this an unusual place for them to
be located?
Hawaii
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Virtual field visits
http://educeth.ethz.ch/stromboli/
The Michigan Technological University Volcanoes Pagehttp://www.geo.mtu.edu/volcanoes/
Global Volcanism Programhttp://www.volcano.si.edu/gvp/
Fallout: Eye on the Volcanohttp://www.nationalgeographic.com/features/98/volcanoes/
Savage earthhttp://www.pbs.org/wnet/savageearth/
Volcano World - a fun and informative web sitehttp://volcano.und.nodak.edu/
Internet links
