geologic time - very general

The second broadest category of geologic time is______________?. The Cenozoic is one of them.

• era

• eon

• epoch

• period

The epoch we are currently living in is the

• Holocene

• Quaternary

• Cambrian

• Pleistocene

What are the names of ALL parts of the geologic time scale in correct order from broadest to narrowest?

• era, period, eon

• eon, era, period, epoch

• era, eon, epoch, period

• eon, era, epoch, period

The Cenozoic is a

• eon

• era

• period

• epoch

The Phanerozoic is a

• eon

• era

• period

• epoch

The earth is ______________of years old

• Hundreds

• Millions

• Billions

• Trillions

What era did the formation of the earth occur?

• Paleozoic

• Precambrian

• Cenozoic

• Cambrian

What type of event usually marks the end of an Era

• A Mass Extinction

• A Quinceanera

• An earthquake

• A Volcanic Eruption

What are the four eras in order from OLDEST to NEWEST?

• Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic

• Pre-Cambrian, Mesozoic, Paleozoic, Cenozoic

• Cenozoic, Mesozoic, Paleozoic, Pre-Cambrian

• Mesozoic, Pre-Cambrian, Cenozoic, Paleozoic

Scientists chose where units of geologic time began and ended based on the appearance or disappearance of life.

• true

• false