Geologic History and Evolution of Life

A time line of Earth’s past is called a geologic ___________

• time scale

• time chart

• time line

• time out

Tags

NGSS.MS-ESS1-4

______________ are the longest units of geologic time.

• eras

• epochs

• eons

• periods

Tags

NGSS.MS-ESS1-4

Eons are subdivided into smaller units of time called ___________________.

• eras

• epochs

• periods

• eons

Eras are subdivided into ________________________.

• eras

• periods

• epoch

• eons

Tags

NGSS.MS-ESS1-4

Period are subdivided into ______________________.

• eras

• periods

• epochs

• eons

Tags

NGSS.MS-ESS1-4

When the geologic time scale was developed, the boundaries of time units were based on the in different rock layers.

• layers

• fossils

• colors

• textures

Tags

NGSS.MS-ESS1-4

The geologic time scale contains eons.

• 6

• 5

• 7

• 4

Tags

NGSS.MS-ESS1-4

___________ rock layers contained only fossils of small, relatively simple life-forms.

• younger

• older

Tags

NGSS.MS-LS4-1

___________ rock layers contained fossils of simple life-forms,

as well as fossils of more complex organisms.

• younger

• older

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Mass extinction is

• is the extinction of a few species on Earth within

  a short period of time.

• is the extinction of many species on Earth within

  a short period of time.

• is the extinction of many species on Earth over

  a long period of time.

• is the extinction of a few species on Earth over

  a long period of time.

Tags

NGSS.MS-LS4-1