Key Vocabulary• crust• molten• magma• eruption• lava• century• crater• Norse• advancing

• weathered• billowy• cinders• composite• summit• extinct• collapsed• caldera

crust

• The solid outer layer of earth

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molten

• made liquid by heat

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magma

• hot melted rock underneath the earth’s surface

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eruption

• A volcanic explosion or large flow of lava

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lava

• hot melted rock that flows from a volcano

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century

• one hundred years

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crater

• A bowl-shaped depression

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Norse

• having to do with the ancient Scandinavians

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advancing

• moving forward

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weathered

• Changed because of being exposed to the weather

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billowy

• Rising in a great wave

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cinders

• charred bits of rock: ashes

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composite

• made up of different substances or parts

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summit

• the top of a mountain

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extinct

• no longer active; extinguished

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collapsed

• fallen inward suddenly

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caldera

• A crater formed by a collapsed volcano

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