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*physical property of liquids *the flow of liquid *high viscosity = thick & slow flow (honey) *low viscosity = thin & quick flow (water) |
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*Magma + silica = higher viscosity *high silica magma = high viscosity lava (granite) = slow flow *low silica magma = low viscosity magma (basalt) = quick flow hotter magma has lower viscosity than cooler magma |
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*very hot magma produces magma called Pahoehoe *low viscosity = flows quickly *hardens into rippled surface |
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*Cooler magma produces lava called Aa *high viscosity = flows slowly *hardens into rough chunks |
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