What is a Volcano?
The cycle of lava as a destructive and constructive force, building the structure of volcanoes and powering their devastating impact. Earth Science - Geology - Learning Points. 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. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.
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