GEOLOGY

Detailed explanation-1: -Volcanoes are classified as active, dormant, or extinct. Active volcanoes have a recent history of eruptions; they are likely to erupt again. 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.

Detailed explanation-2: -Volcanologists use that term as shorthand for “potentially active, ” so a “dormant” volcano is one that is not erupting now, but that is considered “active” because it could erupt in the future. Mount Hood is an active volcano that is currently dormant.

Detailed explanation-3: -Extinct → Extinct volcanoes are those which have not erupted in human history.

Detailed explanation-4: –It is a conical-shaped landform that is built by repeated eruptions.

Detailed explanation-5: -As such, some volcanologists refer to extinct volcanoes as inactive, and some volcanoes once thought to be extinct are now referred to as dormant.