Paleozoic & Mesozoic Eras

Front

What are the four main geologic time periods in order from oldest to most recent?

Back

Precambrian, Paleozoic, Mesozoic, Cenozoic

Front

Which organisms lived during the Mesozoic Era?

Back

Dinosaurs, Flowering Plants, Reptiles. Humans did not live during this era.

Front

What event usually marks the end of an Era?

Back

A Mass Extinction.

Front

In which era did the oceans and atmosphere form?

Back

Precambrian.

Front

When did the first humans appear?

Back

Cenozoic Era.

Front

What is the Paleozoic Era known for?

Back

The emergence of fish, amphibians, and the first 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 are the three main periods of the Mesozoic Era?

Back

Triassic, Jurassic, and Cretaceous.

Front

What is the significance of the Precambrian Era?

Back

It is the longest era and marks the formation of Earth and the development of early life.

Front

What type of organisms dominated the Paleozoic Era?

Back

Marine life, including trilobites and brachiopods.