Geologic Time Scale

What is the Geologic Time Scale?

• It divides up the earth's history based on extraterrestrial forms that have existed during specific times since the planet's creation.

• It divides up the earth's history based on extraterrestrial forms that have existed during specific times since the planet's exctinction.

• It divides up the earth's history based on life forms that have existed during specific times since the planet's exctinction.

• It divides up the earth's history based on life forms that have existed during specific times since the planet's creation.

What are the units of time used to divide the Earth's history?

• Eons, eras, and months

• Months and days

• Eons, eras, periods, and epochs

• Periods, years, months, and days

Which is the largest unit of time?

• Epoch

• Era

• Period

• Eon

Which is the shortest unit of time to measure the Geologic Time Scale?

• Eon

• Era

• Epoch

• Period

Which one is the first eon?

• Archean

• Hadean

• Proterozoic

• Phanerozoic

Which one is the last eon?

• Archean

• Phanerozoic

• Hadean

• Proterozoic

Which is the first period of Phanerozoic Eon?

• Mesozoic

• Cenozoic

• Paleozoic

• Precambrian

Which is the period we are currently living in?

• Hadean

• Mesozoic

• Cenozoic

• Archean

Paleozoic is also known as

• The Age of Mammals

• The Age of invertebrates

• The Age of reptiles

Mesozoic is also known as

• The Age of Mammals

• The Age of Invertebrates

• The Age of Reptiles