8.E.2.1

Front

What is the geologic time scale?

Back

A record of the major events in Earth’s history as well as a documentation of the diverse species through the different eras.

Front

In which era did mammals first appear?

Back

Cenozoic Era

Front

What are index fossils?

Back

Distinctive fossils that existed for only short time periods, used to indicate the age of certain layers of sedimentary rocks.

Front

What does relative dating tell us?

Back

It tells us if something is younger or older than something else.

Front

How can index fossils help determine the age of dinosaur bones?

Back

They can indicate the approximate age of the layers of sedimentary rocks where the bones are found.

Front

What is the significance of the Precambrian Era?

Back

It is the earliest part of Earth's history, covering about 88% of geological time.

Front

What major events occurred during the Paleozoic Era?

Back

The emergence of fish, amphibians, and the first land plants.

Front

What is absolute dating?

Back

A method used to determine the exact age of a rock or fossil, often using radiometric techniques.

Front

What role do fossils play in understanding Earth's history?

Back

Fossils provide evidence of past life and help scientists reconstruct the history of life on Earth.

Front

What is the difference between relative dating and absolute dating?

Back

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