Paleozoic & Mesozoic Eras

Front

What is the estimated age of the Earth according to paleontologists?

Back

4.6 billion years old.

Front

During which era did the earliest dinosaurs appear?

Back

Mesozoic Era.

Front

What era is known for the dominance of trilobites, fishes, and other marine organisms?

Back

Paleozoic Era.

Front

What is the correct order of geological time units from smallest to largest?

Back

Epoch, Period, Era, Eon.

Front

Which era lasted the longest in Earth's history?

Back

Precambrian Era.

Front

What major event marks the end of the Paleozoic Era?

Back

The Permian-Triassic extinction event.

Front

What are the three periods of the Mesozoic Era?

Back

Triassic, Jurassic, and Cretaceous.

Front

What significant evolutionary development occurred during the Mesozoic Era?

Back

The rise of reptiles, including dinosaurs.

Front

What is a key characteristic of the Paleozoic Era?

Back

The emergence of complex life forms, including plants and animals.

Front

What type of organisms dominated the Cenozoic Era?

Back

Mammals and birds.