Earth History Flashcard

Front

Which period saw the formation of Pangea?

Back

Permian

Front

How old is the Earth?

Back

4.6 billion years

Front

What organisms dominated the Paleozoic Era?

Back

Amphibians and fishes

Front

What is the first period of the Paleozoic Era?

Back

Cambrian

Front

What event marked the end of the Mesozoic Era?

Back

The Cretaceous extinction

Front

Define Pangea.

Back

A supercontinent that existed during the late Paleozoic and early Mesozoic eras, formed about 335 million years ago and began to break apart around 175 million years ago.

Front

What is the significance of the Cambrian Explosion?

Back

A rapid diversification of life that occurred approximately 541 million years ago, marking the beginning of the Paleozoic Era.

Front

What major event is known as 'The Great Dying'?

Back

The Permian-Triassic extinction event, about 252 million years ago, which is the Earth's most severe extinction event.

Front

What are the main characteristics of the Mesozoic Era?

Back

Known as the age of reptiles, it saw the rise of dinosaurs, the first birds, and flowering plants.

Front

What is the difference between the Paleozoic and Mesozoic Eras?

Back

The Paleozoic Era is characterized by the development of early life forms, while the Mesozoic Era is known for the dominance of dinosaurs.