The Geologic Time Scale

The entire history of the Earth can be divided into the Precambrian (ancient) Eon and the Phanerozoic (current) Eon. Which of the following correctly represents the percent of Earth's history occupied by each?

• 88% Precambrian, 12% Phanerozoic

• 12% Precambrian, 88% Phanerozoic

• 81% Precambrian, 19% Phanerozoic

• 19% Precambrian, 81% Phanerozoic

Tags

NGSS.MS-ESS1-4

In which time period are we currently living?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

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

In what time period did Pangaea, the super continent, appear?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-ESS1-4

Dinosaurs, small mammals, and birds are found in this time period.

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which era was the longest, taking up 88% of geologic time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-ESS1-4

Which era best represents when humans first appeared on Earth?

• Cenozoic

• Mesozoic

• Archean

• Hadean

Tags

NGSS.MS-LS4-2

Marine plants and invertebrates were abundant during which era?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-LS4-1

Which era is the longest?

• Cenozoic
• Cambrian
• Precambrian
• Phanerozoic

Tags

NGSS.MS-ESS1-4

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

• Precambrian Time
• Cenozoic Time

Tags

NGSS.MS-ESS1-4