Geologic Time Scale

What is the law of superposition?

• The youngest rocks are always at the bottom.

• In an undisturbed sequence of rocks, the oldest rocks are on the bottom and the youngest are on top.

• Rocks that contain inclusions are younger than the surrounding rock.

• Rocks cut by faults are always the oldest.

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

What is the law of crosscutting?

• Rocks that contain fragments are always older.

• The oldest rocks are found on top of younger rocks.

• Any feature that cuts across a sequence of rocks is younger than the rocks it cuts.

• The youngest rocks contain no crosscutting features.

Tags

NGSS.MS-ESS1-4

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

• Relative and Absolute Dating

• Absolute and Resolute Dating

• Carbon and Water Dating

• Relative and Absent Dating

The oldest layer is ​ (a)  

The youngest layer is ​ ​ (b)  

• dark blue 
• orange 
• dark gray 
• light blue 
• white

Tags

NGSS.MS-ESS1-4

Which fossil would make the best index fossil?

• Beetle

• Flower

• Frog

• Fish

Tags

NGSS.MS-LS4-1

Which statement is INCORRECT about the Geologic Time Scale?

• Life was not present when the Earth was still cooling.

• Prokaryotes showed up on Earth long before reptiles and small plants.

• Modern humans arrived later than reptiles and small plants.

• Dinosaurs showed up just after the Earth was created.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

If a student used the analogy of her stacking books in her locker, which law of relative dating is she referring to?

• Law of Superposition

• Law of Original Horizontality

• Law of Cross-Cutting Relationships

• Law of Faunal Succession

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

True or False: Throughout Earth's history, there has been only a single mass extinction.

• True

• False

Tags

NGSS.MS-LS4-1

Analyze the image Above. According to the Law of Superposition, which sequence of letters describes the rock layers in the diagram from oldest to youngest?

• D,C,B,A

• A,B,C,D

• A,B,D,C

• C,D,B,A

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3