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

question 134

Multiple Choice

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

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