A volcano is a large rocky structure on the surface of the Earth. Volcanoes look like hills or mountains but they can be quite dangerous because sometimes hot rocks and gases come spilling out from them. When volcanoes ‘erupt’ like this, they can cause lots of damage to things that are nearby.
But why do volcanoes erupt? And how are they made? If we want to understand how volcanoes work, we need to find out more about the structure of our planet, Earth…
simple scimum 