HISTORY OF THE EARTH UNIT REVIEW

Front

What does the presence of different structures in fossils of the same species indicate?

Back

The species changed over time (evolved).

Front

What is the difference between a law and a theory in science?

Back

A law is an observable fact that describes what is happening.

Front

According to the principle of superposition, which rock layer is the youngest?

Back

The Kaibab Formation.

Front

What is an example of absolute dating?

Back

A rock layer is between 23,000 and 30,000 years old.

Front

What does the fossil record indicate about early life forms?

Back

Most early life forms that left fossil remains are now extinct.

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of ancient organisms.

Front

What is the Law of Superposition?

Back

In undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.

Front

What is evolution?

Back

Evolution is the process by which species change over time through adaptation and natural selection.

Front

What is relative dating?

Back

Relative dating is determining the age of a rock or fossil based on its position relative to other layers.

Front

What is the significance of fossils in understanding Earth's history?

Back

Fossils provide evidence of past life and help scientists understand the evolution of species.