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The top documents tagged [small fragments of lava]
Volcanoes
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Volcanoes
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Volcanoes By Nicole Kawamoto. What is a Volcano? A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth
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VOLCANOES How they work. WHAT IS A VOLCANO? A mountain or hill having a crater or vent through which lava, rock fragments, hot vapor, and gas are being
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