What are the various things that happen during a volcanic eruption?

Magma, or molten rock, erupts through the surface of Earth during an eruption. Magma that comes out is called lava. It can be thick and slow moving or thin and fast. Pieces of rocks and ash also erupt from the volcano. Pumice stone, a light rock full of air bubbles, is formed in an explosive volcanic eruption. These volcanic materials are called pyroclasts.

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