Geologic Time

Front

What are the parts of the geologic time scale in order from broadest to narrowest?

Back

eon, era, period, epoch

Front

Who is credited with developing the theory of evolution?

Back

Charles Darwin

Front

What does absolute age tell us about a rock layer or fossil?

Back

The 'exact' age of a fossil determined by radiometric dating

Front

How old do Paleontologists believe the Earth is?

Back

4.6 billion years old

Front

What is it called when humans select plants or animals for breeding based on desired traits?

Back

artificial selection

Front

What is the term for the time scale that describes the history of Earth?

Back

Geologic Time Scale

Front

What is the difference between relative age and absolute age?

Back

Relative age compares the age of rocks or fossils to one another, while absolute age provides a specific age.

Front

What is radiometric dating?

Back

A method used to determine the age of rocks and fossils by measuring the decay of radioactive isotopes.

Front

What is the significance of the Cambrian Explosion?

Back

It marks a period in Earth's history when a rapid diversification of life occurred.

Front

What are fossils?

Back

Remains or traces of ancient organisms preserved in rock.