Determining Ages of Rocks

Which layer is the oldest?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4

Which method is used to determine the absolute ages of rocks?

• Law of superposition

• Radiometric dating

• Index fossil

• Igneous rocks

Tags

NGSS.HS-ESS1-5

• A

• B

• C

The number of years since a rock was formed (specific number)

• Relative age

• Absolute age

The rock layers on top are the youngest layers, and the lower rock layers are the oldest layers.

• Faults

• Index fossil

• . Igneous rocks

• Radioactive decay (radiometric dating or half life)

• Law of superposition

Tags

NGSS.MS-ESS1-4

preserved remains or traces of living things, Found in layers of Sedimentary rock Index fossils tell the relative age of rocks

• Faults

• Lava

• Magma

• Fossils:

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The scientists use index fossils to determine the relative ages of different rock layers:

• True

• False

Tags

NGSS.MS-ESS1-4

Law of superposition: Top layers

• Younger

• Older

Tags

NGSS.MS-ESS1-4

Law of superposition: Bottom layers

• Younger

• Older

Tags

NGSS.MS-ESS1-4

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4