Fossils and Relative Dating

Front

Which type of rock is most likely to contain fossils?

Back

Sedimentary rocks are most likely to contain fossils because they form in layers and often preserve the remains of living organisms.

Front

What does relative dating of rock layers tell us about the age of rocks?

Back

Relative dating tells us that the deeper we dig, the older the rocks get.

Front

What is the process by which remains or traces of living things become fossils?

Back

Fossilization is the process by which remains or traces of living things become fossils.

Front

Which rock layer in a diagram is usually the oldest?

Back

The bottom layer is usually the oldest, as sedimentary layers are deposited over time.

Front

What is an index fossil?

Back

An index fossil is a fossil that is used to define and identify a particular time period in the geological time scale.

Front

What are trace fossils?

Back

Trace fossils are geological records of biological activity, such as footprints or burrows, rather than the remains of the organism itself.

Front

What is the significance of sedimentary rocks in paleontology?

Back

Sedimentary rocks are significant in paleontology because they often contain fossils that provide information about past life.

Front

How do scientists determine the relative age of rock layers?

Back

Scientists determine the relative age of rock layers by examining their position and the principle of superposition, which states that in undisturbed layers, the oldest layer is at the bottom.

Front

What is the Law of Superposition?

Back

The Law of Superposition states that in any undisturbed sequence of rocks, the oldest rocks are at the bottom and the youngest are at the top.

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a once-living organism.