Volcanoes

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volcano

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A weak spot in the crust where magma has come to the surface

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magma

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Molten rock beneath the earth's surface

Tags

NGSS.MS-ESS2-1

Front

felsic lava

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silica-rich lava, more viscous and solidifies quickly

Tags

NGSS.MS-PS1-1

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lava

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liquid magma that reaches the surface

Tags

NGSS.MS-ESS2-2

NGSS.MS-PS1-4

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mafic lava

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high in magnesium and iron, less than 50% silica; less viscous, flows easily

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subduction

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The process by which oceanic crust sinks beneath a deep-ocean trench or continental crust and back into the mantle at a convergent plate boundary.

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

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hot spot volcanoes

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can arise from the ocean floor, can arise on continents, and may arise in the interior of lithospheric plates

Tags

NGSS.MS-ESS2-1

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mid-ocean ridge

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An undersea mountain chain where new ocean floor is produced; at a divergent plate boundary.

Tags

NGSS.MS-ESS2-3

Front

magma plume

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A rising mass of magma originating from the mantle.

Tags

NGSS.HS-ESS2-1

NGSS.HS-ESS2-3

Front

viscosity

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resistance to flow