Paleozoic Era

Front

What are the smaller units that periods are broken down into?

Back

Epochs

Front

What are the smaller units that eons are broken down into?

Back

Eras

Front

What is the shortest unit of geologic time?

Back

Epoch

Front

What term describes many organisms going extinct in a relatively short period of time?

Back

Mass extinction

Front

What are the smaller units that eras are broken down into?

Back

Periods

Front

What is the Paleozoic Era known for?

Back

The emergence of diverse marine life and the first land plants and animals.

Front

How many periods are in the Paleozoic Era?

Back

Six periods: Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.

Front

What significant event marks the end of the Paleozoic Era?

Back

The Permian-Triassic extinction event, the largest mass extinction in Earth's history.

Front

What type of organisms dominated the Paleozoic Era?

Back

Marine organisms, including trilobites, brachiopods, and early fish.

Front

What major development occurred during the Devonian period?

Back

The evolution of fish and the first appearance of amphibians.