Question

what does the geologic time scale confirm about the cretaceous period?
it ended during the cenozoic era.
it ended during the mesozoic era.
it started before precambrian time.
it started before the cambrian period.

Explanation:

The geologic time scale shows that the Mesozoic era consists of the Triassic, Jurassic, and Cretaceous periods. So the Cretaceous period ended during the Mesozoic era. The Cenozoic era comes after the Mesozoic. The Precambrian time is very early (before the Phanerozoic eon which includes the Paleozoic, Mesozoic, and Cenozoic eras). The Cambrian period is part of the Paleozoic era which is before the Mesozoic.

Answer:

It ended during the Mesozoic era.