what is volcano explain
Answers
Answered by
7
A volcano is a vent in the earth's crust through which lava, rock fragments, hot vapor and gases are ejected. ... As pressure builds within these chambers, magma is expelled through a vent or fissure in the earth's surface as a volcaniceruption. Hot molten rock outside of a volcanotakes on the name lava.
Answered by
8
A volcano is a vent or chimney which transfers molten rock (known as magma) from depth to the Earth's surface through eruptions. Magma erupting from a volcano is called lava. Lava builds up around the vent and forms a cone.
A volcano is currently active if it is erupting lava, releasing gas or generating seismic activity. An active volcano is labelled dormant if it has not erupted for a long time but could erupt again in the future. When a volcano has been dormant for more than 10 000 years, it is considered extinct. Volcanoes can remain inactive, or dormant, for hundreds or thousands of years before erupting again. During this time, they can become covered by vegetation, making them difficult to identify.
How explosive a volcanic eruption is depends on how easily magma can flow or trap gas. If magma is able to trap a large amount of gas, it can produce explosive eruptions.
Attachments:
Similar questions