What's Inside the Volcano?
The Pressure Game
Some volcanoes have magma (hot melted rock) that's full of gas. When the pressure gets too high, kapow! It explodes, like when you pop a balloon with your finger.
Other volcanoes are more laid-back. Their magma is slower and calmer, so they just bubble and ooze out, like a lava lamp slowly changing colors.
So it’s all about pressure and how fast things move inside the volcano. Some go boom, others just bloop!
Examples
- Imagine a cake batter versus honey, the thicker one is harder to pour out.
- Mount Vesuvius exploded because of its thick magma, but Kilauea only gently flows.
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See also
- Why Do Volcanoes Sometimes Erupt in Silence?
- How do Plate Tectonics cause Earthquakes and Volcanoes?
- How Did Hawaii Form?
- How deadly pyroclastic flow is unleashed?
- How Do Volcanoes Shape Continents?