Why is under ground lava called magma and then when it comes up it’s called lava?

You’ve asked a good question. I guess it was just decided that it would help to keep things straight if there were two terms. They really are talking about the same stuff (molten rock). It is just easier this way. If someone is talking about magma you know they are talking about when it is still underground but if they are talking about lava you know they are talking about after it has erupted.


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