Paleozoic & Mesozoic Eras

Front

What is the longest era in Earth's history?

Back

Precambrian Era, which lasted from the formation of Earth about 4.6 billion years ago until approximately 541 million years ago.

Front

What was Pangaea?

Back

A giant landmass that formed near the end of the Paleozoic Era, consisting of all the continents joined together.

Front

Which era are we currently in?

Back

Cenozoic Era, which began about 66 million years ago and continues to the present.

Front

When did the first humans appear?

Back

During the Cenozoic Era.

Front

Which animal is known to have lived during the Mesozoic Era?

Back

Tyrannosaurus rex.

Front

What are the three periods of the Mesozoic Era?

Back

Triassic, Jurassic, and Cretaceous periods.

Front

What significant event marks the end of the Mesozoic Era?

Back

The mass extinction event that occurred about 66 million years ago, leading to the extinction of the dinosaurs.

Front

What major geological feature formed during the Paleozoic Era?

Back

The Appalachian Mountains.

Front

What type of organisms first appeared during the Paleozoic Era?

Back

Marine life, including trilobites and early fish.

Front

What is the significance of the Cambrian Explosion?

Back

It marks a period in the Paleozoic Era when a rapid diversification of life occurred, leading to the emergence of many major groups of animals.