Geologic Time

Front

What is the most recent geological time period?

Back

Cenozoic

Front

Which era do humans belong to?

Back

Cenozoic

Front

What is an index fossil?

Back

Fossils of widely distributed organisms that lived during a geologically short period.

Front

What event usually marks the end of an Era?

Back

A Mass Extinction

Front

Which Era was dominated by dinosaurs?

Back

Mesozoic

Front

What is the Geologic Time Scale?

Back

A system of chronological dating that relates geological strata to time.

Front

What is the Paleozoic Era known for?

Back

The emergence of early life forms, including fish, amphibians, and reptiles.

Front

What significant event occurred at the end of the Mesozoic Era?

Back

The mass extinction event that wiped out the dinosaurs.

Front

What is radioactive dating?

Back

A method used to determine the age of materials by measuring the decay of radioactive isotopes.

Front

What are the three main eras of the Geologic Time Scale?

Back

Paleozoic, Mesozoic, Cenozoic.