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How can material in the lower mantle flow over long periods despite being solid?

Answer and explanation

Correct answer: High temperature and pressure cause slow plastic behavior in solid material

The mantle is solid but can deform plastically over long time. In exams do not treat solid and rigid as identical.

Related tags

GeographyLower MantlePlasticitySolid FlowInterior Structure Of The EarthInterior Of The EarthClass 11 Mcq

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