GEOLOGY

Detailed explanation-1: -Dormant volcanoes have not erupted for a very long time but may erupt at a future time. Extinct volcanoes are not expected to erupt in the future. Inside an active volcano is a chamber in which molten rock, called magma, collects.

Detailed explanation-2: -An extinct volcano is “dead”-it hasn’t erupted in the past 10, 000 years and is not expected to ever erupt again. Kohala on the Big Island of Hawaii could be considered an extinct volcano.

Detailed explanation-3: -Volcanologists describe volcanoes as being active, dormant, or extinct based on how recently they erupted and whether they are likely to do so again. Active: A volcano is considered potentially active if it has erupted during the last 10, 000 years.

Detailed explanation-4: -Extinct → Extinct volcanoes are those which have not erupted in human history. Examples of extinct volcanoes are Mount Thielsen in Oregon in the US and Mount Slemish in Co. Antrim.