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10 Cards in this Set
- Front
- Back
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how does silica help scientists?
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helps them predict volcanic eruptions
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what is magma?
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melted rock before it reaches air
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what is lava?
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melted rock that has reached air
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what does viscosity mean?
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of a material is a physical property that describes the materials resistance to flow
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what is basaltic magma/lava?
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Magma/lava that contains a low percentage of silica is called basaltic magma/lava
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what is Granitic magma/lava?
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Magma/lava that contains a high percentage of silica is called granitic magma/lava
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what is the most common gas in lava?
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water vapor
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what is a shield volcano?
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Huge gently sloping volcanic land form that is mainly composed of basaltic lava
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what is a cinder cone volcano?
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A cinder cone volcano is mainly composed of solid fragments
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what is a composite volcano?
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it is mainly composed of alternating layers of tephra
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