Geologic Time Periods

What does absolute age tell us about a rock layer or fossil?

• The 'exact' age of a fossil determined by radiometric dating

• The relative age of a fossil determined by radiometric dating

• Younger rock layers sit on top of older rock layers

• Older rock layers sit on top of younger rock layers

Tags

NGSS.MS-ESS1-4

The bottom layer of rock...

• is the oldest

• is the youngest

• has the most fossils

Tags

NGSS.MS-ESS1-4

What period provides the first record for many plant and animal groups?

• Cambrian

• Precambrian

• Ordovician

• Permian

Not including the Precambrian, how many Era’s are there?

• 4

• 12

• 3

• 7

Tags

NGSS.MS-ESS1-4

During what Era do we currently live?

• Cenozoic

• Mesozoic

• Paleozoic

• Precambrian

When did modern man first appear?

• Cambrian Period

• Tertiary Period

• Cretaceous Period

• Quaternary Period

Tags

NGSS.MS-LS4-1

How many mya (million years ago) did reptiles dominate the Earth?

• 180-230 mya

• 230-310 mya

• 130-230 mya

• 230-270 mya

Tags

NGSS.MS-LS4-1

During what Era did organisms invade Earth's land masses?

• Cenozoic

• Paleozoic

• Devonian

• Mississippian

Which form of life did not exist during the Precambrian era?

• stromatilites

• blue-green algae

• bacteria

• sponges

These are the third longest units of geologic time. Eras are divided up into these.

• periods

• eons

• epochs

• unconformities

Tags

NGSS.MS-ESS1-4