The elliptical shape of the Earth's orbit varies with time and takes about ____ to complete a cycle. This is a factor in the Milankovitch theory of ice ages.
A)24 hours
B)one year
C)26 years
D)260 years
E)100,000 years

Question

Quizplus · Accepted Answer

The elliptical shape of Earth's orbit varies over a time span, roughly 100,000 years, which is known as eccentricity. This parameter is an essential factor in the Milankovitch theory of ice ages.

The Elliptical Shape of the Earth's Orbit Varies with Time