History of the Earth

Front

What is a geologic time scale?

Back

A system of chronological dating that compares geological strata to time.

Front

What does a geologic time scale look like?

Back

Front

What is the largest unit of a geologic time scale?

Back

Eon

Front

What is another name for Cenozoic?

Back

Recent life

Front

What is a geologic time scale used for?

Back

To study the history of the earth.

Front

What is a Rock strata?

Back

A layer of rock

Front

What is the law of Superposition?

Back

In any layers of rock the youngest layer is on top while the oldest is on the bottom.

Front

What is the law of crosscutting?

Back

The rock that cuts another is the youngest of the two.

Front

What is relative dating?

Back

A way of knowing the relative order of past events without knowing their age.

Front

What is Absolute dating?

Back

The process of finding out the age on a past order of events in archaeology or geology.