There have been about __________ glacial-interglacial cycles during the Quaternary period.

Name: There have been about __________ glacial-interglacial cycles during the Quaternary period.
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Question

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There have been 22 glacial-interglacial cycles during the Quaternary period, which covers the last 2.6 million years. These cycles involve periods of cooling and glaciation known as ice ages, followed by warmer interglacial periods.

There Have Been About __________ Glacial-Interglacial Cycles During the Quaternary