How Does a Volcano Know When to Erupt?

A volcano erupts when it feels too full. Imagine a bottle of soda, if you shake it up and then open it, it fizzes out like lava! Inside a volcano, magma builds up pressure, and when it gets too tight, Boom! It explodes.

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Examples

When you shake up a bottle of soda and open it, it fizzes out like lava.
A volcano is like a full bottle waiting to be opened.
Bubbles in the magma are like bubbles in a shaken soda bottle.

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Categories: Science · volcanology,earth science,natural disasters