Volcanoes can be categorized as active, dormant or extinct. Although definitions vary from scientist to scientist, a volcano is considered active if it has erupted recently or erupts regularly. A dormant volcano refers to a volcano that has not erupted recently, but will likely erupt again. An extinct volcano is a volcano that will never erupt again because its magma supply has been cut off. One point of disagreement between scientists is their definition of recently. For some, it means within the last 10, 000 years. For others, much shorter. The line between active, dormant and extinct volcanoes can be blurry. In some rare cases, volcanoes long thought to be extinct have unexpectedly come back to life.Which of the following would most likely be classified as an active volcano?

VOLCANOES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Volcanoes can be categorized as active, dormant or extinct. Although definitions vary from scientist to scientist, a volcano is considered active if it has erupted recently or erupts regularly. A dormant volcano refers to a volcano that has not erupted recently, but will likely erupt again. An extinct volcano is a volcano that will never erupt again because its magma supply has been cut off. One point of disagreement between scientists is their definition of “recently.” For some, it means within the last 10, 000 years. For others, much shorter. The line between active, dormant and extinct volcanoes can be blurry. In some rare cases, volcanoes long thought to be extinct have unexpectedly come back to “life.”Which of the following would most likely be classified as an active volcano?

A	a mountain that shows no history of eruption
B	a volcano that has erupted twice in the past 350 years
C	a volcano that is now an island with a population of 200, 000
D	a volcano that erupted 12, 000 years ago and is still connected to its magma supply

Explanation:

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: -If your volcano is making noise or popping off, then its active. If your volcano has erupted in the past but right now is quiet, it is likely dormant. If your volcano hasn’t erupted in over a million years, you have yourself an ex-volcano.

Detailed explanation-3: -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-4: -According to their research, there are 1434 volcanoes known to be active on the Earth. Nearly all of these are dormant. If, for example, there were 14 volcanic eruptions currently happening, then the number of dormant volcanoes would be 1420.

There is 1 question to complete.

GEOLOGY

EARTH SCIENCE

VOLCANOES