Rock Correlation

Which best describes a fossil that helps determine the relative age of a rock layer?

• trace fossil
• index fossil
• radioactive fossil
• unconformity fossil

Tags

NGSS.MS-ESS1-4

The index fossil of a type of trilobite is discovered in layer A of a set of rock layers found at three different sites of a field investigation. Which conclusion can be made about the rocks in layer A at all three sites?

• The rocks are all different ages
• The rocks are all about the same age
• The rocks were formed from melting magma
• The rocks were formed during a catastrophic event

Tags

NGSS.MS-ESS1-4

Fossil remains of a trilobite are most likely to be found in which type of rock?

• igneous
• volcanic
• sedimentary
• metamorphic

Tags

NGSS.MS-LS4-1

Which statement best describes the Law of Superposition?

• Each sedimentary layer of rock represents 1,000 years of Earth's age, much like the rings of a tree.
• In undisturbed layers of sedimentary rocks, the upper rock layers are older than the lower rock layers.
• In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
• Rocks that form near volcanoes are older than surrounding rock.

Tags

NGSS.MS-ESS1-4

What lettered rock layer is the youngest?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4

Organisms that later became good index fossils lived over a

• wide geographic area and existed for a long geologic time

• wide geographic area and existed for a short geologic time

• limited geographic area and existed for a long geologic time

• limited geographic area and existed for a short geologic time

Tags

NGSS.MS-LS4-1

How does the law of crosscutting explain the age of a fault?

• The fault is younger than the rocks above it.
• The fault is younger than the rocks it cuts through.
• The fault is older than the rocks above it.
• The fault is older than the rocks it cuts through.

Tags

NGSS.MS-ESS1-4

The rock formation labeled "P" is a(n)...

• fault

• igneous intrusion

• inclusion

• unconformity

Tags

NGSS.MS-ESS1-4

Which fossil is considered an index fossil?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

When the rock layers in the three outcrops are correlated, the oldest layer is the

• shale layer in outcrop I

• siltstone layer in outcrop II

• limestone layer in outcrop III

• conglomerate layer in outcrop III

Tags

NGSS.MS-ESS1-4