Past Organisms
Traces or remains of a once living thing that has been preserved.
What is a fossil?
A timeline of Earth’s history divided by major events of change on Earth is called what?
What is the Geologic Time Scale?
The largest division of geologic time.
What is an eon?
When age compared with ages of other rocks and can only show which rocks are older or younger.
What is relative dating?
A super continent that was created when all the land masses on Earth combined.
What is Pangea?
A scientist that studies, collects, and classifies fossil.
What is a paleontologist?
Geologic time begins with a long span of time which covers about 88 percent of Earth’s history and ended about 544 million years ago.
What is the Precambrian Eon?
Periods can be divided into this.
What is an epoch?
Determines the age of rocks and other objects in years
What is absolute dating?
The gradual change in living things over long period of time is called what?
What is evolution?
Gases and fluids are pressed out of the organism and a thin film forms an outline of the original organism.
What is a carbon film?
Age of the mammal.
What is the Cenozoic era?
Two or more periods make up this.
What is an era?
In horizontal sedimentary rock layers the oldest layer is at the bottom; each layer higher is younger than the layer below it.
What is the law of superposition?
These organisms are first seen in the Precambrian eon, are photosynthetic and gradually changed the Earth's carbon dioxide-rich atmosphere to include increasing amounts of oxygen.
What is Cyanobacteria?
A type of fossil that is preserved evidence of life or other events.
What is a trace fossil?
Age of the reptiles.
What is the Mesozoic?
Two or more eras make up this.
What is an eon?
If a feature cuts through the rock layers, it is younger than the rock.
What is a crosscutting relationship?
The end of the Paleozoic Eon ended because of this.
What is the Permian Mass Extinction?
Name the requirements that cause a fossil to form.
What is protection from scavengers, quickly buried, hard parts like, bones, shells, and stems, rock layer are undisturbed?
Age of fish.
What is the Paleozoic?
This is how the geologic time scale is organized.
What is major events in Earth's history?
Elements occur naturally in the environment and they break down and change into another element.
What is radioactive dating?
The evidence that supports the theory of Pangea.
What is similar rocks, fossils, glacial deposits that have been found where the continent broke apart and continents fit together like a puzzle?