Biology, 02.11.2019 07:31 Miamibloem4709

Which of the following has caused 100,00 year cycles of ice ages in the past?
a. an increase in sun spots
b. several major volcanic eruptions
c. changes in earths orbit and the tilt of its axis
d. continental drift

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Which of the following has caused 100,00 year cycles of ice ages in the past?
a. an increase...

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