Geologic History Review

Front

Approximately how many years ago did Earth form?

Back

4.6 billion years ago

Front

Which was the last life form to emerge on Earth?

Back

humans

Front

Earth is a fiery ball of molten rock. There is no air on Earth, but bacteria, the first living organism, first appeared. Which period of time does this represent? Options: Precambrian Era, Paleozoic Era, Mesozoic Era, Cenozoic Era

Back

Precambrian Era

Front

Order the geologic time eras from oldest to most recent.

Back

Precambrian, Paleozoic, Mesozoic, Cenozoic

Front

The Cenozoic Era is often called "the Age of the ____"

Back

Mammals

Front

Age of aquatic species or amphibians was during which era?

Back

Paleozoic

Front

Age of reptiles/dinosaurs was during this era: Cenozoic, Mesozoic, Paleozoic

Back

Mesozoic

Front

Each era of Earth's history ends with...

Back

A mass extinction

Front

What is Relative Dating?

Back

It determines whether an object is older or younger than other objects

Front

What is a Fossil?

Back

Traces or remains of organisms that lived long ago