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Q 1/33
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Rocks record geological events and
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life forms of the past
Q 2/33
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For what purpose do geologists use relative dating?
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determine which rock layer in a canyon wall formed first
33 questions
Q.
Rocks record geological events and
1
30 sec
Q.
For what purpose do geologists use relative dating?
2
30 sec
Q.
In general, the law of superposition states that in an undedeformed sequence of sedimentary rocks, each layer is
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30 sec
Q.
What are fossils?
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30 sec
Q.
Which of the following environments would NOT contain fossils?
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30 sec
Q.
Index fossils allow geologists to
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30 sec
Q.
The principle of fossil succession states that different types of fossil organisms
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30 sec
Q.
What length of time is covered by the geologic time scale?
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30 sec
Q.
About 88% of Earth's history is within the time period before the phanerozoic eon, called the
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30 sec
Q.
The Laws of Superposition and orgininal horizontality are best applied to
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30 sec
Q.
Largest expanse of time on the geologic time scale
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Q.
Name of the doctrine that states the physical, chemical and biological laws that operate in the geologic past
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30 sec
Q.
Name given to layers of tilted rocks that have eroded and are overlain by younger, more flat-lying rock layers.
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Q.
Principle states that most layers of sediments are deposited in a horizontal postion
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Q.
Name is given to pieces of rock that are contained within another, younger rock
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Q.
concept that processes that have shaped Earth in the past are essentially the same as those operating today.
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surface that represents a break in the rock record, caused by erosion or lack of deposition
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basic unit of the geologic time scale and can be divided into epochs
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place on or above something
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layers or layer of rock
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a rock or fault is younger than any rock or fault through which it cuts
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layers of sediment are generally deposited horizontal
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Q.
remain or traces of an organism preserved from the geologic past
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Q.
Major division on the geologic time scale and can be divided into periods
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30 sec
Q.
Gondwana encompasses 5 continents; Life restricted to seas; Pangea; Begin of land plants; diversified amphibians; Great Extinction (warming climate)
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Dinosaurs; Break up of Pangea; Gymnosperms; Shelled eggs; Reptiles dominant
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Mountain bldg, volcanism, earthquakes in West; Mammals; Angiosperms; Extinction
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Q.
What information do rocks provide to geologists?
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Q.
any division of geological time into chronological units, whether relative (with units in the correct temporal sequence) or absolute (with numerical ages attached)
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Q.
The geologic age of a fossil organism, rock, or geologic feature or event defined relative to other organisms, rocks, or features or events rather than in terms of years.
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true age of a rock or fossil.
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Q.
procedure of calculating the absolute ages of rocks and minerals that contain radioactive isotopes.
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Q.
amount of time necessary for one-half of the nuclei in a sample to decay to a stable isotope.
