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Volcano vocabulary to help you understand the most recent eruptions

from Popular Science

The distinction between lava and magma is a fine one. Both terms refer to molten rock, but once magma leaves the earth's interior and flows out the open air, it becomes lava. It's sort of like the alchemy of “meteor" into "meteorite" once a chunk of space rock touches ground — a linguistic metamorphosis as much as, or more than, a physical one. more

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