The Rock And Fossil Record: Question Preview (ID: 16268)

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The time when eras are divided.
a) eon
b) period
c) era
d) epoch

The use of rock layers to determine age.
a) relative dating
b) absolute dating
c) radioactive decay
d) geologic time

Used for dating things that lived within the last 50,000 years.
a) Potassium-Argon Method
b) Uranium-Lead Method
c) Rubidium-Strontium Method
d) Carbon 14

Any method of measuring the age of an event or object in years.
a) adsolute dating
b) relative dating
c) half-life
d) radiometric dating

A unit of geologic time that includes two or more periods.
a) eon
b) period
c) era
d) geologic time scale

A break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time.
a) intrusion
b) fault
c) folding
d) uncomformity

The standard method used to divide the Earth's long natural history into manageable parts.
a) era
b) eon
c) geologic time scale
d) period

A subdivision of a geologic period.
a) period
b) era
c) eon
d) epoch

A mark or cavity made in a sedimentary surface by a shell or other body.
a) cast
b) mold
c) trace fossil
d) index fossil

A principle that states that geologic change occurs suddenly.
a) uniformitarianism
b) paleontology
c) superposition
d) catastrophism

A fossil that is found in the rock layers of only one geologic age and that is used to establish the age of the rock layers.
a) ammonites
b) index fossil
c) trace fossil
d) trilobite

The death of every member of species.
a) eon
b) epoch
c) ear
d) extinction

The era that came to an end with the largest mass extinction.
a) Mesozoic
b) Cenozoic
c) Paleozoic
d) Archean Eon

Younger rock is over older rock.
a) unconformity
b) tilting
c) uniformitarianism
d) superposition

A naturally preserved evidence of animal activity.
a) index fossil
b) cast
c) mold
d) trace fossi

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