Answers MO-Earth and Space Science A Cycles of Matter — Unit testQuestion 9

9

QuizMultiple Choice

Cycles of Matter — Unit test

Question 9 of 25 • MO-Earth and Space Science A

Which best describes eras and periods?

Answer

A

Eras have a smaller time span than periods.

B

Eras and periods are independent of each other.

C

Eras and periods both appear at the start of the Cambrian period.

D

Eras were more recently established on the time scale than periods.

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