Geologic Time and Relative Dating

Front

What is the Cenozoic Era known as?

Back

The Age of Mammals.

Front

Which layer of rock is the oldest?

Back

Layer 4 because it is on the bottom.

Front

What percentage of Earth's history does the Precambrian Eon represent?

Back

88% of Earth’s time.

Front

What is the Mesozoic Era known as?

Back

The Age of Reptiles.

Front

What is the Paleozoic Era known as?

Back

The Age of Invertebrates.

Front

Define Geologic Time Scale.

Back

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

Front

What is relative dating in geology?

Back

A method used to determine the age of rocks and fossils by comparing them to other rocks and fossils.

Front

What is the significance of fossils in relative dating?

Back

Fossils help to establish the relative ages of rock layers and the organisms that lived during those times.

Front

What does the term 'Eon' refer to in geologic time?

Back

The largest division of geologic time, which is divided into eras.

Front

What are the three major eras of the Phanerozoic Eon?

Back

Paleozoic, Mesozoic, and Cenozoic.