Volcanoes erupt when pent up gases are released. Solid rock melts into magma. It spills out of the mountain and is called LAVA - PowerPoint PPT Presentation

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Volcanoes erupt when pent up gases are released. Solid rock melts into magma. It spills out of the mountain and is called LAVA

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Mount Vesuvius in Italy erupted in AD79. It wiped out 2 cities and 15,000 people died. ... A Tornado is formed in a thunderstorm. They need warm and wet air. ... – PowerPoint PPT presentation

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