Front

What is the significance of rock layers in dating Earth's history?

Back

They provide evidence of when rocks existed.

Tags

NGSS.MS-ESS1-4

Front

What is the longest time period in the geologic time scale?

Back

Eon.

Tags

NGSS.MS-ESS1-4

Front

Which of the fossils is the oldest?

Back

Trilobite.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Front

Order the divisions of geologic time from the longest to the shortest.

Back

Eons, Eras, Periods.

Tags

NGSS.MS-ESS1-4

Front

What is the shortest time frame in the geologic time scale?

Back

Epoch.

Front

What is the Geologic Time Scale?

Back

A system of chronological dating that relates geological strata to time.

Tags

NGSS.MS-ESS1-4

Front

What are the main divisions of the Geologic Time Scale?

Back

Eons, Eras, Periods, and Epochs.

Tags

NGSS.MS-ESS1-4

Front

What is an Eon?

Back

The largest division of geological time, lasting hundreds of millions to billions of years.

Tags

NGSS.MS-ESS1-4

Front

What is an Era?

Back

A subdivision of an Eon, lasting tens to hundreds of millions of years.

Tags

NGSS.MS-ESS1-4

Front

What is a Period?

Back

A subdivision of an Era, lasting tens of millions of years.

Tags

NGSS.MS-ESS1-4