Which of the following is considered to be the most likely cause of the Quaternary Ice ages?
A) plate tectonics moving continents to polar regions
B) variations in the earth's orbit Milankovitch cycles.
C) sunspots
D) human activity releasing "greenhouse" gases

Question

Quizplus · Accepted Answer

The Milankovitch cycles are variations in the earth's orbit and axial tilt that affect the amount and distribution of solar radiation, and are considered to be the most likely cause of the Quaternary Ice Ages. Plate tectonics have an effect on climate, but not to the extent that they could cause Ice Ages. Sunspots do not have a significant enough effect on climate to cause Ice Ages. Human activity contributing to greenhouse gas emissions is a current issue but did not play a significant role in past Ice Ages.

Which of the Following Is Considered to Be the Most