what is volacno explain?
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Explanation:
A volcano is an opening in the earth's crust through which lava, volcanic ash, and gases escape. ... Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth's crust. As the magma rises, pressure decreases, allowing the gases to form bubbles
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Volcanoes are openings, or vents where lava, tephra (small rocks), and steam erupt on to the Earth's surface.
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