Geologic Time Scale

In which time period are we currently living?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Phanerozoic Eon

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

• Sedimentary rocks

• Radioactive dating

• Decayed organisms

• Fossils

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The Law of Superposition states

• Younger rocks layers are on top of older rock layers

• Fossils are found in sedimentary rocks

• Older rock layers are on top of younger rock layers

• Absolute age dating

Tags

NGSS.MS-ESS1-4

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

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-ESS1-4

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

What two methods are used for determining the age of rocks and fossils?

• Relative and Absolute Dating

• Carbon and Water Dating

• Sedimentary and Igneous Rocks

• Spatial and Layered Dating

Tags

NGSS.MS-ESS1-4

Which is the youngest rock layer?

• Siltstone

• Conglomerate

• Mudstone

• Limestone

Tags

NGSS.MS-ESS1-4

Which of the following organizes the divisions of geologic time from longest to shortest?

• eons, eras, periods, epochs

• epochs, periods, eras, eons

• periods, eons, epochs, eras

• eras, epochs, eons, periods

Tags

NGSS.MS-ESS1-4

The geologic time scale is a record of....

• the history of fossils only
• the history of rocks
• the history of rock layers and fossils
• geologist notes

Tags

NGSS.MS-ESS1-4

Use the diagram to answer. Which rock layer has a fossil that is older than the fish fossil?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1