Geologic Time Scale

The Geologic Time Scale is a record of what?

• old geologists
• sweet geology music
• the known history of rocks and fossils
• a list of every living thing ever

Tags

NGSS.MS-ESS1-4

Which Era occurred last (most recent)?

• Cenozoic

• Mesozoic

• Paleozoic

What is the oldest organism on the geologic time scale?

• primitive horses

• sea scorpions

• giant insects

• trilobites

Tags

NGSS.MS-LS4-1

This is the model of Earth's history from its origin 4.6 billion years ago to the present.

• geologic time scale

• key beds

• index fossils

• major geologic events

Tags

NGSS.MS-ESS1-4

These are the longest units of geologic time.

• eons

• era

• period

• epoch

Tags

NGSS.MS-ESS1-4

These are the second longest units of geologic time. Eons are divided up into these.

• eras

• periods

• epochs

• unconformities

These are the third longest units of geologic time. Eras are divided up into these.

• periods

• eons

• epochs

• unconformities

Tags

NGSS.MS-ESS1-4

These are the smallest main unit of geologic time. Periods are broken up into these.

• epochs

• eons

• eras

• unconformities

Tags

NGSS.MS-ESS1-4

What is the approximate age of Earth?

• 4.6 thousand

• 4.6 million

• 4.6 billion

• 4.6 trillion

What era came first?

• Palezoic
• Mesozoic
• Cenozoic
• Precambrian

Tags

NGSS.MS-ESS1-4