Biology Chapter 12 Quiz

The smallest unit of geologic time, typically lasting millions of years.

• Eon

• Era

• Period

• Epoch

The largest unit of geologic time and can last billions of years.

• Eon

• Era

• Period

• Epoch

The belief that the universe is approximately 4.5 billion years old and spontaneously came into existence due to favorable conditions is

• Evolutionism

• Creationism

• Study of Origins

This era existed between 200 and 65 million years ago, and contains the jurassic period.

• Paleozoic

• Mesozoic

• Cenozoic

This occurs when between 60% and 75% of species alive go extinct each time. These typically mark the end of an Era.

• Ice Age

• Mass Extinction

• Meteor Shower

A method used to determine the age of rocks by using the decay of radioactive isotopes.

• Relative Dating

• The Law of Superposition

• Radiometric Dating

The boundaries that occur when two tectonic plates are moving apart from one another are

• Convergent Boundaries

• Divergent Boundaries

• Transform Boundaries

The belief that the universe and living things originate from certain acts of divine creation by a divine being is

• Evolutionism

• Creationism

• Study of Origins

The thought that younger layers of rock are deposited on top of older rock layers is known as

• Relative Dating

• The Law of Superposition

• Radiometric Dating

This era started 56 million years ago and still exists today. It is characterized by the appearance of mammals

• Paleozoic

• Mesozoic

• Cenozoic