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Sometimes the plates on the earths crust crash into each other, forcing one to go lower. The friction causes the rock to get hotter and hotter until it melts. This is called magma. The magma keeps getting hotter, but it needs somewhere to go, so it surges up through the earths crust, making a hole. That is how a volcano is made. Once the hole is made, magma from the earths core comes to the surface, causing the volcano to spit lava

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16y ago

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