Dating of Rocks & Fossils

Front

What is the age relationship between rock layers and the Earth?

Back

The Earth is older than any rock layer.

Front

What do fossils help scientists understand?

Back

The history of life on Earth.

Front

True or False: The Earth is older than the bottom layer of rock.

Back

True.

Front

What process did Mildred use to determine the age of her fossil sample?

Back

Radioactive dating.

Front

What are index fossils?

Back

Fossils used to define and identify a particular time period in the geological time scale.

Front

Give an example of an index fossil.

Back

Trilobites.

Front

What is radioactive dating?

Back

A method used to determine the age of an object by measuring the amount of carbon-14 it contains.

Front

What is the principle of superposition?

Back

In undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.

Front

What are trilobites?

Back

An extinct group of marine animals known for their hard-shelled bodies divided into three sections.

Front

What is the significance of fossils in geology?

Back

Fossils provide evidence of past life and help in dating rock layers.