Paleontologists think Earth is approximately how many years old?

• 2.5 billion

• 4.6 billion

• 3.0 billion

• 1.2 billion

Tags

NGSS.MS-ESS1-4

In which era do we currently live?

• Paleozoic

• Mesozoic

• Cenozoic

• Precambrian

Which of the following is a period of the Mesozoic Era?

• Precambrian

• Jurassic

• Neogene

• Ordovician

Which is NOT an eon?

• Archean

• Proterozoic

• Hadean

• Paleocene

Which division on the geologic time scale is the shortest?

• Eon

• Epoch

• Era

• Period

Tags

NGSS.MS-ESS1-4

The timespan that lasted the longest was the:

• Mesozoic

• Cenozoic

• Paleozoic

• Precambrian

Tags

NGSS.MS-ESS1-4

The era that ended with the largest extinction we know of is the:

• Mesozoic

• Cenozoic

• Paleozoic

• Precambrian

Tags

NGSS.MS-LS4-1

The “Age of the Reptiles” was the:

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Of the following, which is the youngest period of geologic time?

• Paleogene

• Archean

• Devonian

• Quaternary

Tags

NGSS.MS-ESS1-4

Corals appeared during the _____ Era.

• Mesozoic

• Cenozoic

• Paleozoic

• Cretaceous