GEOLOGY

EARTH SCIENCE

VOLCANOES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statement about dormant volcanoes must be true?
A
They can never erupt again.
B
They have not erupted for a very long time.
C
They will erupt within the next 12 months.
D
They were formerly stratovolcanoes.
Explanation: 

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: -Dormant → Dormant volcanoes are volcanoes that have not erupted in a long time but are expected to erupt again in the future. Examples of dormant volcanoes are Mount Kilimanjaro, Tanzania, Africa and Mount Fuji in Japan.

Detailed explanation-3: -Volcano World That is the definition of active used by the Global Volcanism Program in their catalogs. A dormant volcano would then be one that hasn’t erupted in the past 10, 000 years, but which is expected to erupt again. An extinct volcano would be one that nobody expects to ever erupt again.

Detailed explanation-4: -Scientists believe the magma chambers-or reservoirs of molten rock-under dormant volcanoes are filled with sticky, viscous mush. For a volcano to “wake up, ” this mush needs to be thoroughly heated by fresh, hot magma rising up from the deep Earth.

Detailed explanation-5: -Examples of dormant volcanoes are Mount Kilimanjaro in Tanzania, Africa, and Mount Fuji in Japan.

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