Layers of Time

Over millions of years, sediments such as sand and silt were laid down and compressed to form sedimentary rock layers. They preserve a record of ancient landscapes, climates, and organisms.

You can use the sequence of sedimentary rock layers and the fossils found within them to figure out the period(s) that organism(s) existed.

• GOT IT!

• I don't get it.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Observe each of the layers. Which layer is the oldest?

• quaternary

• tertiary

• permian

• carboniferous

Tags

NGSS.MS-ESS1-4

Observe each of the layers. Which layer is the youngest?

• quaternary

• tertiary

• permian

• carboniferous

Tags

NGSS.MS-ESS1-4

Observe each of the layers. Which organism went extinct first?

• dicynodont

• flowering plant

• ammonites

• homo sapiens

Tags

NGSS.MS-LS4-1

Observe each of the layers. Which of the following organisms did not go extinct?

• dicynodont

• flowering plants

• icthyosaurs

• ammonites

Tags

NGSS.MS-LS4-1

Which two organisms are still present today?

• dicynodonts and icthyosaurs

• ammonites and dicynodonts

• dicynodonts and ammonites

• flowering plants and homo sapiens

Tags

NGSS.MS-LS4-1

True or False: Homo sapiens went extinct during the quarternary period.

• True

• False

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Which organism was present during the carboniferous period?

• dicynodont

• flowering plants

• icthyosaurs

• ammonites

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

Observe each of the layers. True or False: Ammonites and homo sapiens existed during the same time period(s).

• True

• False

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Observe each of the layers. True or False: Ichthyosaurs and ammonites existed at the same time.

• True

• False

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1