Geological Time Scale and Mass Extinctions

__________ were used to develop the geologic time scale.

• Fossils

• Meteorites

• Sedimentary rocks

Tags

NGSS.MS-ESS1-4

Older rocks and fossils tend to be at the.....

• Top

• Bottom

Tags

NGSS.MS-ESS1-4

Eons, the longest unit of geologic time, are subdivided into_________________.

• eras

• epochs

• periods

Tags

NGSS.MS-ESS1-4

A______________ can cause extinctions by causing the blocking of sunlight.

• rise in sea level

• volcanic eruption

• shift in earth's plates

Tags

NGSS.MS-ESS3-2

Periods are subdivided into________________.

• eras

• epochs

• eons

A _______________ is the disappearance of many species within a short time period.

• multicellular organism

• volcanic eruption

• mass extinction

• Precambrian disturbance

Tags

NGSS.MS-LS4-1

Jurassic and Ordovician are examples of geologic ______________.

• eons

• epochs

• eras

• periods

Tags

NGSS.MS-ESS1-4

The Cretaceous period is part of the _________________ era.

• Mesozoic

• Paleozoic

• Triassic

• Phanerozoic

Tags

NGSS.MS-ESS1-4

The Cambrian period is part of the _________________ era.

• Mesozoic

• Paleozoic

• Triassic

• Phanerozoic

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

The Mesozoic era includes the_________________ period.

• Mesozoic

• Paleozoic

• Triassic

• Phanerozoic

Tags

NGSS.MS-ESS1-4