Geologic Time Scale

_______________ is the long span of time that begins geologic time.

• Precambrian Time
• Cenozoic Time

Tags

NGSS.MS-ESS1-4

A unit of geologic time that subdivides eras

• period
• time span

Tags

NGSS.MS-ESS1-4

The Triassic Period, the Jurassic Period, and the Cretaceous Period occurred in what era?

• Cenozoic
• Mesozoic

Tags

NGSS.MS-ESS1-4

Scientists chose where units of geologic time began on major changes in ______________ at certain times.

• life forms
• events

Tags

NGSS.MS-ESS1-4

Scientists divided the time between Precambrian Time and the present into three units of time, or eras.

• True
• False

Tags

NGSS.MS-ESS1-4

___________ a record of the geologic events and the evolution of life forms as shown in the fossil record. 

• Eras
• Geologic Time Scale

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

 The Quaternary period, where humans first appeared, is in the Mesozoic era.

• True
• False

Which period are we currently in?

• Quaternary
• Holocene
• Jurassic
• Tertiary

Tags

NGSS.MS-ESS1-4

Paleontologists infer that the earth is approximately how many years old?

• 4.5 million years
• 450 million years
• 450 billion years
• 4.5 billion years

Tags

NGSS.MS-ESS1-4

Jellyfish are one of the oldest species on Earth. In what time period did they first appear?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-LS4-1