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Volcanoes
1. Volcanoes
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A volcano is an opening, or rupture, in the surface orcrust of the Earth.
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On Earth, volcanoes are generally found wheretectonic plates are diverging or converging.
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There are three common types of volcano:composite volcanoes;
shield volcanoes;
cinder cones.
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Erupting volcanoes can pose many hazards.6.
Lava has a temperature of morethan 1200 ° C
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The largest volcanoon Earth is Hawaii's.
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The most active volcano in the continental USA is Mt.St. Helens.
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Volcanic eruptions continue posing ever-greaterthreats to life.
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South of Mexico City,Popocat petl has begun to
come to life again.
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Another million people livingin the Naples area are threatened.