The preserved remains or evidence of ancient living things...

An organism is ______________ if it no longer exits and will never live again on Earth.

A ______________________ is a scientist who studies fossils.

Scientist study the ____________________ to learn about the history of life, past environments on Earth, and how different groups of organisms have changed over time.

Method by which order of events or age of rocks is determined by examining the position of rocks in a layer

Gaps in rock records made when erosion remove existing rock layers

Principle of geology that states that the geologic feature which cuts another is the younger of the two features.