Magma is the name given to molten material inside the earth (volcano) whereas lava is the name given to molten material which is often ejected from a volcano and then cools and solidifies.

When a volcano erupts there can be lava, ash, steam or gaseous emissions. Sometimes eruptions are explosive and lava is thrown out as volcanic bombs. Hotspots are places where the magma rises up ...

Vents are openings in the Earth's crust from which magma and volcanic gases escape onto the ground or into the atmosphere. Vents may consist of a single, circular-shaped structure, a large ...

Over time, repeated eruptions build up a volcanic structure, forming an underwater volcano. If the eruptions continue, the volcano grows large enough to break the ocean surface, forming a volcanic ...