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Film summary
The cycle of lava as a destructive and constructive force, building the structure of volcanoes and powering their devastating impact.Key facts
- Volcanoes are landforms that occur along plate boundaries.
- Volcanoes consist of a magma chamber, main and secondary vents and a crater.
- Volcanic eruptions occur when pressure forces magma from the chamber to the main vent.
- The pressure forces the crater to blow and release molten rock, ash and a cocktail of gases into the atmosphere.
Transcript
Volcanoes are our most explosive landforms.
Able to eject molten rock, and clouds of thick ash, high into the atmosphere with devastating consequences.
Volcanoes mostly occur along destructive and constructive plate boundaries, where plates are pushed together or dragged apart.
Destructive or constructive boundaries
Cracks or weaknesses allow magma to rise up from below ...
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