GTS Flashcard

Front

What are fossils?

Back

Remains, imprints, or traces of once-living organisms.

Front

What is relative dating?

Back

A dating method used on rock layers by applying the Law of Superposition.

Front

In which geologic time period are dinosaurs, small mammals, and birds found?

Back

Mesozoic.

Front

What is a paleontologist?

Back

A scientist who studies fossils.

Front

What is a period in geology?

Back

A unit of geologic time that subdivides eras.

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 absolute dating?

Back

A method used to determine the exact age of a rock or fossil.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the order of events, while absolute dating provides a specific age.

Front

What are the four main geologic time periods?

Back

Precambrian, Paleozoic, Mesozoic, Cenozoic.

Front

What is the significance of the Mesozoic era?

Back

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