Geologic time scale

a model scientists use to describe the timing of events and the relationships between those events in earth’s history.

• geologic time scale

• era

• period

• epoch

Tags

NGSS.MS-ESS1-4

one of four long periods of geologic time from Precambrian to the present.

• geologic time scale

• era

• period

• epoch

Tags

NGSS.MS-ESS1-4

geologic time intervals that eras are divided into.

• geologic time scale

• era

• period

• epoch

Tags

NGSS.MS-ESS1-4

a division of geologic time; a subdivision of a period. Shortest length of time.

• geologic time scale

• era

• period

• epoch

Tags

NGSS.MS-ESS1-4

a fossil found in a narrow time range but widely distributed around the earth; used to date rock layers.

• Petrified

• Mold

• Cast

• Index

• Trace Fossil

Tags

NGSS.MS-ESS1-4

What Era were mammals first seen?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Age of fish and amphibians

• extinction

• paleozoic era

• fossil record

• Precambrian era

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

age of mammals that lasted from 65 million years ago to the present; the era of modern life

• Cenozoic Era

• Mesozoic Era

• epoch

• period

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

The Death of every member of a species

• extinction

• Paleozoic era

• relative age

• Permian extinction

Tags

NGSS.MS-LS4-1

the trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock

• fossil record

• geologic time scale

• species

• fossil

Tags

NGSS.MS-LS4-1