Front

What is the order of the geologic time eras from oldest to most recent?

Back

Precambrian, Paleozoic, Mesozoic, Cenozoic

Front

Which vertebrates have been around longer: fish or amphibians?

Back

Fish

Front

What is the most recent era of geologic time that we are currently in?

Back

Cenozoic

Front

What do you call scientists who study the structure and history of the Earth?

Back

Geologists

Front

Which of the following organisms has been around for the shortest amount of time: Dinosaurs, Mammals, Humans, or Reptiles?

Back

Humans

Front

What is the significance of the Precambrian era in the geologic timescale?

Back

It is the longest era, covering about 88% of Earth's history, and includes the formation of the Earth and the earliest life forms.

Front

What major events occurred during the Paleozoic era?

Back

The emergence of fish, amphibians, and the first land plants.

Front

What distinguishes the Mesozoic era from other eras?

Back

It is known as the age of reptiles, including the dominance of dinosaurs.

Front

What are the three periods of the Mesozoic era?

Back

Triassic, Jurassic, and Cretaceous.

Front

What major extinction event marks the end of the Mesozoic era?

Back

The Cretaceous-Paleogene extinction event.