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Volcanoes
A volcano forms when a break in the Earth’s crust allows magma and hot gas to reach the surface.
The magma and hot gasses are under extreme pressure, resulting in dangerous eruptions.
Volcanoes come in all different shapes and sizes.
Some volcanoes have very steep sides that have been caused by the piling-up of lots of volcanic material over time, others have shallow slopes from very runny lava.
Volcanoes can also look like depressions in the ground that are caused when the land sinks from explosions under the ground.