What Makes a ‘Volcano’ Erupt So Violently?

A volcano erupts when pressure builds up inside the Earth like a bottle of soda being shaken and then opened. Imagine you have a bottle full of soda, and you shake it, bubbles form inside. When you open it, the soda fizzes out in a big rush! A volcano is kind of like that bottle: magma (hot liquid rock) builds up pressure underground, and when it finally comes out, it erupts violently.

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Examples

  1. A soda bottle shaken and then opened, causing a sudden burst of liquid and gas.
  2. A pressure cooker exploding when it's overfilled with steam.
  3. A balloon popping from too much air inside.

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