Volcano


 
 
Concept Explanation
 

Volcano

A volcano is a vent (opening) in the earth’s crust through which molten material erupts suddenly.

Volcanoes are divided into three types based on their frequency of eruption – active volcanoes, dormant volcanoes and extinct volcanoes.

Active volcanoes are those that have erupted recently. Mt Etna and Mt Stromboli of the Mediterranean Sea are the most significant examples of these category.

Dormant volcanoes are those that have been quit for a long time but show signs that they could erupt again. Mt Vesuvius is an excellent example of dormant volcano.

Extinct volcanoes, like Mt Kilimanjaro in Tanzania, Africa, show no indication of future eruption.

Sample Questions
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Question : 1

Mt Etna and Mt Stromboli of the mediterranean  Sea are the most significant examples of _________.

Right Option : A
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Question : 2

Mt Vesuvius is an excellent example of _________________

Right Option : A
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Question : 3

A ___________ is a vent in the earth crust through which molten material erupts suddenly.

Right Option : A
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Explanation
 
 


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