The Rock Record
The Fossil Record
The Geologic Time Scale
Precambrian and Paleozoic Eras
Mesozoic and Cenozoic ErasS
100
Sedimentary rock layers that are younger than layers below...
What is Law of Superposition
100
The study of fossils...
What is paleontology
100
The gradual development of new organisms from preexisting organisms...
What is evolution
100
The Earth formed....
What is 4.6 billion years ago
100
The percentage of land organisms that died at the end of the Permian Period...
What is 70% or 78%
200
A fossilized mark formed by the movement of an animal...
What is trace fossil
200
The type of rock in which almost all fossils are discovered...
What is sedimentary rock
200
An episode during which an enormous number of species dies...
What is mass extinction
200
The Paleozoic Era occured...
What is AFTER the Precambrian time
200
The earliest flowering plant, which appeared during the Cretaceous Period...
What is angiosperm
300
A break in the geologic record...
What is uncomformity
300
The remains of an animal or plant that lived in a previous geologic time...
What is fossil
300
A chart outlining the development Earth and life on Earth...
What is geologic time scale
300
The Precambrian time ended...
What is 540 million years ago
300
The era that is called the Age of Mammals...
What is Cenozoic Era
400
Determining absolute age by comparing radioactive and stable isotopes...
What is radiometric dating
400
Types of rock in which fossils are rarely discovered...
What is igneous or metamorphic rock
400
"206 Ma" means...
What is 206 MILLION years ago
400
Little is known about the Precambrian time because...
What is Precambrian rocks were damaged and therefore could not be identified.
400
The period of the Cenozoic Era that includes the time before the last ice age....
What is Tertiary Period
500
Current geologic processes are the same as those that were at work in the past...
What is Uniformitarianism
500
The type of fossil that is formed when mud fills a mold and hardens...
What is cast
500
A theory that a meteorite caused the extinction of dinosaurs...
What is impact hypothesis
500
Precambrian fossils consisting of reeflike deposits fromed by blue-green algae are called...
What is stromatolites
500
Another name for the Mesozoic Era...
What is the Age of Reptiles
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