Index Fossils

Front

An organism that no longer exists on Earth is called

Back

Extinct

Front

Which rock layer contains the newest fossils?

Back

F

Front

According to the law of superposition, where are the oldest fossils found?

Back

Near the bottom of the rock layers

Front

The best index fossils have which two traits? Options: widespread geographically, long lifespan, widespread geographically, short lifespan, specific place, long lifespan, specific place, short lifespan

Back

widespread geographically, short lifespan

Front

Index fossils help determine relative age through correlating rock layers.

Back

True

Front

One of the oldest organisms discovered is called a(n) _________.

Back

trilobite

Front

The Law of Superposition helps scientists to determine what?

Back

The relative age of rock layers

Front

According to the law of superposition, which layer is the youngest?

Back

A

Front

Which rock layer in the diagram seems to be the oldest?

Back

A

Front

Which rock layer most likely contains fossils of the most recently evolved organisms?

Back

Rock layer 1