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.
Examples
- A pressure cooker exploding when it's overfilled with steam.
- A balloon popping from too much air inside.
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See also
- Why Do Volcanoes Sometimes Erupt Quietly?
- Why Do Volcanoes Sometimes Explode in a Violent Eruption?
- Why Do Volcanoes Erupt?
- How Does The Earth's crust: tectonic plate movement, volcanoes, tsunami Work?
- How Does The Types of Volcanic Eruptions; A Volcanologist's Guide Work?