Fossil Evidence of Evolution

Front

What is mass extinction?

Back

Mass extinction occurs when many different kinds of living things become extinct within a few million years or less.

Front

What is a cast in terms of fossils?

Back

A cast is a fossil copy of an organism in a rock.

Front

What is a trace fossil?

Back

A trace fossil is a type of fossil that provides evidence of the activities of ancient organisms, such as footprints or burrows.

Front

What are eons?

Back

Eons are the longest time units in the geological time scale.

Front

What is the geologic time scale?

Back

The geologic time scale is a chart that divides Earth's history into different time units.

Front

What is a mold in fossil terms?

Back

A mold is a fossilized impression of an organism in a rock.

Front

What is carbonization?

Back

Carbonization is a process where organic material is reduced to carbon, forming a fossil.

Front

What are epochs?

Back

Epochs are smaller time units within the geological time scale, which are shorter than periods.

Front

What is relative-age dating?

Back

Relative-age dating is a method used to determine the age of rocks and fossils in relation to one another.

Front

What is absolute-age dating?

Back

Absolute-age dating is a method used to determine the actual age of a rock or fossil, often using radiometric dating.