Geologic Time Scale

Which is the youngest rock layer?

• Siltstone

• Conglomerate

• Mudstone

• Limestone

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

Approximately how old is Earth?

• 1 million years

• 4.6 billion years

• 4.6 million years

• 4 thousand years

Tags

NGSS.MS-ESS1-4

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

• Sedimentary rocks

• Radioactive dating

• Decayed organisms

• Fossils

Tags

NGSS.MS-LS4-1

When classifying time using the Geologic Time Scale which unit is the largest unit of time?

• Period

• Eon

• Epoch

• Era

Tags

NGSS.MS-ESS1-4

What supereon was the longest, taking up 88% of geologic time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-ESS1-4

Put the following units of geological time in order from largest to smallest unit of time.

• Epoch, Eon, Era, Period

• Epoch, Period, Era, Eon

• Eon, Era, Period, Epoch

• Period, Eon, Period, Era

Tags

NGSS.MS-ESS1-4

The end of the Mesozoic Era was most likely caused by?

• A meteor

• Too much oxygen

• Lowering sea levels

• An ice age

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS2-2

Which fossil would make the best index fossil?

• Beetle

• Flower

• Frog

• Fish

Tags

NGSS.MS-LS4-1

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

• The age of one rock layer or fossil compared to another.

• 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

Use relative age dating to put the rock layers in correct order from oldest to youngest.

• B, D, A, E, C

• C, E, D, A, B

• A, C, E, D, B

• C, E, D, B, A

Tags

NGSS.MS-ESS1-4