8th grade Earth Science 7-2

What is a relative age of a rock?

• an exact age, in years

• an exact age as shown by index fossils

• an approximate age when compared to other rocks

Which principle could be used to date a stack of horizontal rock layers?

• superposition

• lateral continuity

• cross-cutting relationships

Tags

NGSS.MS-ESS1-4

Which principle states that sedimentary rocks are deposited as large sheets of sediment?

• correlation

• lateral continuity

• original horizontality

Which statement is true of inclusions?

• They are older than the rocks that contain them.

• They are younger than the rocks that contain them.

• They are the same age as the rocks that contain them.

Tags

NGSS.MS-ESS1-4

What is true of any fault?

• It is older than the rocks it cuts.

• It is younger than the rocks it cuts.

• It is the same age as the rocks it cuts.

Tags

NGSS.MS-ESS1-4

What is a nonconformity?

• an erosion gap in the rock record

• a method of matching similar rocks

• a contact between sedimentary and other rock types.

Which species make good index fossils?

• ones that were very large

• ones that lived in one place

• ones that lived for a short period of time

Which rock layer is the youngest?

• a

• b

• c

• d

Tags

NGSS.MS-ESS1-4

Which is oldest?

• a

• b

• c

• d

Tags

NGSS.MS-ESS1-4

Which principle of relative age dating explains the age of rock layer B?

• superposition

• lateral continuity

• cross-cutting relationships

• original horizontality

Tags

NGSS.MS-ESS1-4