History of Life on Earth

Front

What is a fossil?

Back

A fossil is a trace or imprint of a living organism preserved in rock.

Front

What era is known for the appearance of fish and the colonization of land by plants and animals?

Back

The Paleozoic era.

Front

During which time were prokaryotes the dominant life form?

Back

During the Precambrian time.

Front

What does extinction mean?

Back

Extinction occurs when every individual of a species has died.

Front

What are epochs?

Back

Epochs are divisions of periods in the geological time scale.

Front

What is the Precambrian time?

Back

The Precambrian time is the earliest part of Earth's history, before the Paleozoic era.

Front

What significant event marks the end of the Paleozoic era?

Back

The Permian-Triassic extinction event.

Front

What is the Mesozoic era known for?

Back

The Mesozoic era is known as the age of reptiles, including dinosaurs.

Front

What is the Cenozoic era?

Back

The Cenozoic era is the current geological era, known as the age of mammals.

Front

What is the difference between a period and an epoch?

Back

A period is a larger division of geological time than an epoch.