The ice ages are caused by:
A) the drift of the continents.
B) the eruption of supervolcanoes.
C) the sunspot cycle.
D) minor changes in Earth's rotation and orbit.
E) variations in solar output.

Question

Quizplus · Accepted Answer

Minor changes in Earth's rotation and orbit, known as Milankovitch cycles, are a significant factor in causing ice ages. These cycles affect the amount and distribution of solar energy received by the Earth, leading to periods of cooling and ice age conditions.

The Ice Ages Are Caused By