Fossils and Geologic Time Scale

How are the intervals in the geologic time scale divided?

• By major events or changes on Earth

• By sets of billion years, called eons

• Earth's rotation around the Sun

Tags

NGSS.MS-ESS1-4

Use the diagram to answer this question.

Which is the oldest layer?

• A

• E

• F

Tags

NGSS.MS-ESS1-4

True or False: Life forms have evolved and changed constantly during Earth's history.

• True

• False

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Use the geologic time scale to answer this question.

During which epoch were mammals dominant in?

• Oligocene

• Holocene

• Eocene

Tags

NGSS.MS-ESS1-4

The first evidence of life on Earth can be traced back to about...

• 3.8 thousand years ago

• 3.8 million years ago

• 3.8 billion years ago

Tags

NGSS.MS-LS4-1

Where is the oldest layer in an undisturbed sedimentary rock found?

• On the top

• In the middle

• On the bottom

Tags

NGSS.MS-ESS1-4

This diagram shows the fossil records of different species. (U, V, W, X, Y and Z).

When did species W become extinct?

• At the end of Permian

• At the end of Cretaceous

• At the end of Cambrian

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS1-4

A fossil of a saber-toothed tiger footprint is an example of...

• carbon film fossil

• trace fossil

• original remains

Tags

NGSS.MS-LS4-1

When did humans first appear?

• Mesozoic era

• Cenozoic era

• Precambrian time

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Use the diagram to answer this question.

Which fossil is the youngest fossil?

• 1

• 3

• 4

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS1-4