Geologic Time Scale

The standard method used to divide the Earth's long history into manageable parts

• relative age

• geologic time scale

• fossil record

• Permian extinction

Tags

NGSS.MS-ESS1-4

Each rock layer is newer than the one below it

• law of superposition

• geologic time scale

• Permian extinction

• Paleozoic era

Tags

NGSS.MS-ESS1-4

a fossil that is used to establish the age of a rock layer because the fossil is distinct, abundant, and widespread and the species that formed that fossil existed for only a short span of geologic time

• index fossil

• fossil record

• fossil

• relative age

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

A particular period in geologic history (for example Paleozoic, Mesozoic, Cenozoic)

• Cenozoic Era

• Period

• Epoch

• Era

Tags

NGSS.MS-ESS1-4

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

a particular period in geologic history (for example, Cambrian, Devonian, Jurassic, Tertiary)

• epoch

• era

• period

• Cenozoic era

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

a historical sequence of life indicated by fossils found in layers of Earth's crust

• fossil

• geologic time scale

• species

• fossil record

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Preserved remains of plants and animals from the remote past are called?

• Sedimentary rocks

• Radioactive dating

• Decayed organisms

• Fossils

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The Law of Superposition states

• Younger rocks layers are on top of older rock layers

• Fossils are found in sedimentary rocks

• Older rock layers are on top of younger rock layers

• Absolute age dating

Tags

NGSS.MS-ESS1-4

The end of an era, and the end of life for groups of organisms, is called?

• Death

• Mass extinction

• Transition

• Turning point

Tags

NGSS.MS-LS4-1