Geological Time Scale

Front

What are the three eras of the Phanerozoic?

Back

Paleozoic, Mesozoic, Cenozoic

Front

What term describes a group of living things that are no longer living?

Back

Extinct

Front

In which eon do we know there was no life?

Back

Hadean

Front

What is Mesozoic an example of?

Back

An era

Front

When did the formation of the moon occur?

Back

Archean

Front

What is the geological time scale?

Back

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

Front

What are the four eons of Earth's history?

Back

Hadean, Archean, Proterozoic, Phanerozoic

Front

What major event marks the beginning of the Paleozoic Era?

Back

The Cambrian Explosion.

Front

What is the significance of the Mesozoic Era?

Back

It is known as the age of reptiles, including dinosaurs.

Front

What major extinction event occurred at the end of the Mesozoic Era?

Back

The Cretaceous-Paleogene extinction event.