Geologic Time Scale 2 Question Preview (ID: 40224)
Review Geologic Time.
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Relative dating of rock layers tells us that the deeper we dig, _______.
a) the older the rocks get
b) the younger the fossils
c) the harder the rocks get
d) the more porous the rocks get
Describe absolute age.
a) number of years that have passed since the rock formed. It provides the rock with a specific age.
b) how long ago the sediments settled out and formed rock
c) the age of a fossil
d) how old an intrusion is
Which division on the geologic time scale is the shortest?
a) eon
b) era
c) period
d) epoch
Which type of dating method can be used on rock layers by applying the Law of Superposition?
a) relative dating
b) absolute dating
c) radiometric dating
d) radioactive dating
The ________ states that layers of sediment were originally deposited horizontally under the action of gravity.
a) Law of Superposition
b) Law of Horizontality
c) Law of Cross-Cutting
d) Uniformitarianism
Trilobites are good __________ fossils because they were abundant and widespread geographically.
a) cast
b) trace
c) mold
d) index
A hardened layer of magma beneath the Earth's surface:
a) a fault
b) an unconformity
c) an intrusion
d) an extrusion
The Triassic, Jurassic, and Cretaceous periods occurred in the ___________ Era.
a) Paleozoic Era
b) Cenozoic Era
c) Mesozoic Era
d) Precambrian Era
The earliest form of life known on Earth was
a) multi-celled organisms
b) leafy plants
c) single-celled organisms
d) fossils
Which Virginia province are we located in?
a) Piedmont
b) Appalachian Plateau
c) Blue Ridge
d) Valley and Ridge
Which Virginia province is the western most province?
a) Coastal Plain
b) Piedmont
c) Appalachian Plateau
d) Valley and Ridge
Which of the Virginia provinces below has Igneous and Metamorphic Rocks
a) Coastal Plain
b) Piedmont
c) Blue Ridge
d) Valley and Ridge
The biggest unit in the geologic time scale is the:
a) eon
b) era
c) period
d) epoch
What is the primary purpose of index fossils?
a) They help scientists determine the absolute age of sedimentary rocks
b) They help scientists determine the relative age of rocks
c) They help scientists identify mass extinctions in Earth’s history
d) They provide scientists with evidence for the theory of evolution by natural selection
Eras are broken into:
a) eons
b) periods
c) ages
d) epochs
What is the name of the epoch in which we live?
a) Neogene
b) Cenozoic
c) Holocene
d) Quaternary
A fossil that is widespread and found during the same time periods that can be used to help identify the relative ages of rocks.
a) index
b) trace
c) cast
d) mold
Rocks were first created during this geologic time division:
a) Precambrian eon
b) Paleozoic era
c) Mesozoic era
d) Cenozoic era
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