what is a volcano explain briefly
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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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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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