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14 Cards in this Set

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The solidified remains or imprints of a once-living organism.
relative dating
Determining whether an event or object, such as a fossil, is older or younger than other events or objects.
absolute dating
Determining the age of an object or event in years, usually by measuring the amount of unstable atoms in the sample.
geologic time scale
The division of Earth's history into distinct intervals.
Describes a species of organism that has died out completely.
Precambrian time
The period of geologic time scale beginning when the Earth originated 4.6 billion years ago to about 540 million years ago.
Paleozoic era
The period of geologic time scale beginning about 570 million years ago and ending about 248 million years ago.
Mesozoic era
The period of geologic time scale beginning about 248 million years ago and ending about 65 millions years ago.
Cenozoic era
The period of geologic time scale beginning about 65 million years ago and continuing until present day.
A type of mammal that includes humans, apes, and monkeys with opposable thumbs and binocular vision.
The family referring specifically to humans and several extinct, humanlike species.
An early hominid that evolved more than 3.6 million years ago.
A species of hominid that lived in Europe and western Asia from 230,000 years ago to 30,000 years ago.
plate tectonics
The study of the forces that drive the movement of pieces of Earth's crust around the surface of the planet.