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5
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forms when magma hardens in a volcano's pipe
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6
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is the mixture of hot gases,ash,cinders,and bombs that flow down the side of the volcano
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7
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a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
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8
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such lava flows slowly build a wide,gently sloping mountain
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11
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belt of volcanoes & frequent seismic activity nearly encircling the Pacific.
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13
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is a circular depression in the ground caused by volcanic activity
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14
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a curved chain of volcanic islands located at a tectonic plate margin, typically with a deep ocean trench on the convex side.
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16
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is a large underground pool of liquid rock found beneath the surface of the Earth.
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20
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these minerals can build up around the vent in a steep cone shaped hill or small mountain
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1
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is the hole left of a volcano collapses
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2
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is the spread of lava as it pours out of the vent
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3
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magma that forces itself across rock layers hardens
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4
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are tall,cone-shaped mountains in which layer of lava alternate with layers of ash
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9
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a long tube that expends from earth's crust up through the top of the volcano
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10
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a volcano that is sleeping ,and becomes active
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12
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hot molten or semifluid rock erupted from a volcano or fissure
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15
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molten rock and gas leave the volcano through an opening
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17
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hot fluid or semi-fluid material below or within the earth's crust
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18
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a hard, unreactive, colorless compound that occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.
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19
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is an area where material from deep within earth's mantle rises through the crust and melts magma
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