The eccentricity portion of Milankovitch's astronomical theory refers to:
A)changes in the tilt of Earth's axis.
B)the unpredictability of Earth's weather.
C)changes in the rate of Earth's rotation.
D)variations in the energy emitted by the Sun.
E)changes in the shape of Earth's orbit.

Question

Quizplus · Accepted Answer

The eccentricity portion of Milankovitch's astronomical theory refers to changes in the shape of Earth's orbit, specifically how the orbit changes from being nearly circular to more elliptical over a period of about 100,000 years. This variation affects the amount of solar radiation received by Earth at different times in its orbit and plays a role in the cycles of glaciation and warming over long periods.

The Eccentricity Portion of Milankovitch's Astronomical Theory Refers To