These Principles include Superposition, Original Horizontality, Lateral Continuity, Cross-Cutting Relationships, and Inclusion.

According to scientists, the Earth is approximately this many years old.

He was a Scottish naturalist and farmer who came up with the Principle of Uniformitarianism. He is considered the person who developed the idea of geologic time and proposed that the Earth was much older than people thought at the time.

The mineralized remains of organisms and the rock layers in which they are found

A break or a gap in the geologic record when rock layers are eroded over a long period of time, "losing" those rocks

Process that uses the properties of atoms in rocks and other objects to determine their ages 

The period of geologic time when the biodiversity of life on the planet increased dramatically was

Which of the following would be an example of absolute age?

This is the actual age of something.

This is the age of rocks and geologic features as compared with other rocks and geologic features nearby.

This man developed a set of principles to compare the ages of rocks.

According to this Principle, in undisturbed rock layers, the oldest rocks are on the bottom.

According to this Principle, if one geologic feature cuts across another feature, the feature that it cuts across is older.

According to this Principle, if one rock contains pieces of another rock, the rock containing the pieces is younger than the pieces of rock it contains.

These are the preserved remains or evidence of ancient living things.

According to this Principle, geologic processes that occur today are similar to those that have occurred in the past.

Which principle states that in undisturbed rock layers, the oldest rocks are at the bottom?

What is the term for the preserved remains or evidence of ancient living things?

Which process uses the decay of radioactive isotopes to determine the age of rocks?

What is the name of the principle that suggests geologic processes occurring today are similar to those that occurred in the past?

Which period is known for a dramatic increase in biodiversity on Earth?

What is the term for a gap in the geologic record where rock layers have been eroded?

Who proposed the Principle of Uniformitarianism, suggesting that the Earth is much older than previously thought?

What is the term for the actual age of a rock or fossil?