Geo Time

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

How old do Paleontologists believe the Earth is?

• 2015 years old

• 3.6 billion years old

• 4.6 billion years old

• 4.6 million years old

Paleozoic, Mesozoic & Cenozoic are all

• Epochs

• Eras

• Periods

• Eons

Which is the most recent era of time- the one that we are currently in?

• Mesozoic 

• Paleozoic 

• Cenozoic 

• Precambrian 

True or False: Geologists subdivide periods into eras.

• False

• True

Describe how geologists separate time periods.

• by special events that have happened in that period.

• By looking at the Relative Time of a Fossil

• By counting the years a fossil has been preserved

Name the 4 time frames in order from oldest to youngest.

• Precambrian Time, Paleozoic Era, Mesozoic Era, Cenozoic Era

• Mesozoic Era, Precambrian time, Cenozoic Era, Paleozoic Era

• Paleozoic Era, Mesozoic Era, Precambrian Time, Cenozoic

Which division on the geologic time scale is the shortest?

• epoch

• era

• eon

• period

The time span that lasted the longest was the...

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

The Era with the largest extinction we know of is the... 

• Mesozoic era

• Precambrian era

• Paleozoic era

• Cenozoic era