Multiple Choice
Our textbook discusses the cosmic calendar, a model of the history of the universe scaled to a single year. The length of time represented by one month on this cosmic calendar is therefore:
A) about one million years.
B) about ten million years.
C) about 1000 years.
D) about one billion years.
E) about ten billion years.
Correct Answer:

Verified
Correct Answer:
Verified
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