Earth History exam 4

Front

What is the order of geological time units from largest to smallest?

Back

Eon, Era, Period, Epoch

Tags

NGSS.MS-ESS1-4

Front

Geological time segments are based on what?

Back

Significant evolutionary events in Earth's history.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Front

What major changes or events divide the geologic time scale?

Back

Mass extinctions.

Tags

NGSS.MS-ESS1-4

Front

What principle states that in undisturbed rock layers, younger layers are on top of older ones?

Back

Principle of superposition.

Tags

NGSS.MS-ESS1-4

Front

What is the principle that states sedimentary rock layers form flat to begin with?

Back

Principle of original horizontally.

Front

Define 'Eon' in geological time.

Back

The largest division of geological time, encompassing billions of years.

Tags

NGSS.MS-ESS1-4

Front

What is an 'Era' in geological time?

Back

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

Tags

NGSS.MS-ESS1-4

Front

What is a 'Period' in geological time?

Back

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

Tags

NGSS.MS-ESS1-4

Front

What is an 'Epoch' in geological time?

Back

A subdivision of a period, lasting millions of years.

Tags

NGSS.MS-ESS1-4

Front

What does the Principle of Uniformitarianism state?

Back

The processes that shape the Earth today are the same as those that shaped it in the past.

Tags

NGSS.MS-ESS3-1