A volcano is a type of mountain. It has an opening called a vent. Molten rock called magma from below the surface of the Earth can make its way onto the surface through this vent. When magma reaches the surface of the Earth it is called lava. In addition to lava volcanoes also emit rock debris, ash and gases.
Classification of Volcanoes
Volcanoes may be classified according to their level of activity. When classified in this way they are divided into the following groups:
Active volcanoes: These are volcanoes which are erupting or have erupted in recent history and are believed to have the ability to erupt again. Examples of active volcanoes include Mauna Loa in Hawaii and Soufriere Hills Volcano in Montserrat.
Extinct volcanoes: These are volcanoes which have erupted in the past but are no longer believed to have the ability to erupt. An example of extinct volcano is Mount Ashitaka in Japan.
Dormant volcanoes: These are volcanoes which not erupted for a very long time but are not believed to be extinct. They may still erupt at some point in the future. Examples of dormant volcanoes are Mount Kilimanjaro in Africa and Qualibou (also known as the Soufriere Volcanic Centre) in Soufriere, St. Lucia.
Watch the video below to learn more about volcanoes!
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