Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

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What defines a dormant volcano?

A volcano that is currently erupting.
A volcano that is no longer capable of eruption.
A volcano that has no signs of activity.
A volcano that shows signs of activity between eruptions.

The correct answer is: A volcano that shows signs of activity between eruptions.

A dormant volcano is characterized by having the potential to erupt again in the future but is not currently active. This definition encompasses the concept that, while the volcano is not erupting at the moment, it has exhibited signs of activity at some point in the past and may do so again. In this context, "signs of activity" might include historical eruptions, seismic activity, or the presence of gas emissions. However, these indicators are not constant or currently observable; rather, they indicate a capability or likelihood of future eruptions, distinguishing dormant volcanoes from those that are extinct, which are no longer expected to erupt again. This understanding is crucial for volcanology and risk assessment in areas near such geological features. The other definitions do not align with the proper classification of a dormant volcano, as they either refer to active or extinct conditions. This delineation is significant for comprehending volcanic activity and geological hazards.