Difference between revisions of "Volcano"
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'''Volcanoes''' are formed along 2 different types of [[Tectonic Plate Margin|tectonic plate margin]]; [[Destructive Plate Margin]]s and [[Constructive Plate Margin]]s. | '''Volcanoes''' are formed along 2 different types of [[Tectonic Plate Margin|tectonic plate margin]]; [[Destructive Plate Margin]]s and [[Constructive Plate Margin]]s. | ||
| − | At [[Destructive Plate Margin]]s more [[dense]] [[Oceanic Plate|oceanic plate]] moves under the less [[dense]] [[Continental Plate|continental plate]]. As this happens the [[Oceanic Plate|oceanic plate]] is melted and a lot of [[magma]] forms. This [[magma]] then rises towards the surface of the [[crust]] through cracks in the [[crust]] called [[vents]]. As this [[magma]] reaches the surface | + | At [[Destructive Plate Margin]]s more [[dense]] [[Oceanic Plate|oceanic plate]] moves under the less [[dense]] [[Continental Plate|continental plate]]. As this happens the [[Oceanic Plate|oceanic plate]] is melted and a lot of [[magma]] forms in a large pool. This [[magma]] then rises towards the surface of the [[crust]] through cracks in the [[crust]] called [[vents]]. As this [[magma]] reaches the surface an extremely violent [[Volcanic Eruption]] is created due to high [[pressure]] that built up as the [[magma]] moved through the [[vents]] being released. Once this [[Volcanic Eruption]] had occurred the [[lava]] that was produced cools and forms [[rock]] in the form of a mountain. This is a [[Volcano]] |
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| + | At [[Constructive Plate Margin]]s two [[Tectonic Plate]]s are moving away from each other and this creates a very large and deep gap. [[Magma]] rises up towards the surface of the earths [[crust]] through this gap. This then causes the [[magma]] to erupt as it reaches the surface of the [[crust]]. This is a much less violent eruption as the [[magma]] has risen through a much wider gap than the size of the [[vents]] at the [[Destructive Plate Margin]] and therefore less [[pressure]] is built up and the [[volcanic eruption]] is less explosive. The [[lava]] that has erupted then solidifies into rock and a volcano is formed. | ||
==Beyond the Curriculum== | ==Beyond the Curriculum== | ||
{{#ev:youtube|https://www.youtube.com/watch?v=yDy28QtdYJY}} | {{#ev:youtube|https://www.youtube.com/watch?v=yDy28QtdYJY}} | ||
Revision as of 12:51, 30 July 2019
Contents
Key Stage 2
Meaning
A volcano is a mountain made from lava that has cooled to become rock.
Key Stage 3
Meaning
A volcano is a mountain made from lava that has cooled to become igneous rock.
About Volcanoes
- Volcanoes are usually found near the boundaries between tectonic plates.
Key Stage 4
Meaning
A volcano is a mountain made from lava that has cooled to become igneous rock.
About Volcanoes
Volcanoes are usually found near the boundaries between tectonic plates.
How Volcanoes are formed
Volcanoes are formed along 2 different types of tectonic plate margin; Destructive Plate Margins and Constructive Plate Margins.
At Destructive Plate Margins more dense oceanic plate moves under the less dense continental plate. As this happens the oceanic plate is melted and a lot of magma forms in a large pool. This magma then rises towards the surface of the crust through cracks in the crust called vents. As this magma reaches the surface an extremely violent Volcanic Eruption is created due to high pressure that built up as the magma moved through the vents being released. Once this Volcanic Eruption had occurred the lava that was produced cools and forms rock in the form of a mountain. This is a Volcano
At Constructive Plate Margins two Tectonic Plates are moving away from each other and this creates a very large and deep gap. Magma rises up towards the surface of the earths crust through this gap. This then causes the magma to erupt as it reaches the surface of the crust. This is a much less violent eruption as the magma has risen through a much wider gap than the size of the vents at the Destructive Plate Margin and therefore less pressure is built up and the volcanic eruption is less explosive. The lava that has erupted then solidifies into rock and a volcano is formed.