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Browse worksheets →Every one of our 48,009 articles is written five times over. Here is “Volcano” at three of those levels.
A volcano is a hole in the ground. Hot liquid comes out.
A volcano is an opening in a planet's surface. It lets hot lava, ash, and gases escape from below.
A volcano is a vent or fissure in the crust of a planetary-mass object. On Earth, these openings allow hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
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