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Geologic Time Vocabulary

Quiz by Jennifer Pendleton

Grade 8
Science
North Carolina Standard Course of Study

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30 questions
Show answers
  • Q1
    The age of a rock given as the number of years since the rock formed.

    radioactive dating

    unconformity

    relative age

    absolute age
    45s
  • Q2
    the gradual movement of the continents across the Earth's surface through geological time.

    geologic time scale

    unconformity

    fault

    continental drift
    45s
  • Q3
    a crack in the earth's crust resulting from the displacement of one side with respect to the other
    fault

    ice core

    fossil

    continental drift

    45s
  • Q4
    The preserved remains or traces of an organism that lived in the past

    fault

    ice core

    unconformity

    fossil
    45s
  • Q5
    A record of the geologic events and life forms in Earth's history.
    geologic time scale

    radioactive dating

    continental drift

    plate tectonics

    45s
  • Q6
    length of time required for half of the radioactive atoms in a sample to decay

    absolute age

    relative age

    index fossil

    half-life
    45s
  • Q7
    cylinders of ice drilled out from glaciers and polar ice sheets that provide data about the composition of Earth's atmosphere throughout time.

    fossil

    ice cores

    unconformity

    fault

    45s
  • Q8
    a type of rock that forms from the cooling of molten rock at or below the surface

    metamorphic rock

    igneous rock

    sandstone

    sedimentary rock

    45s
  • Q9
    fossils of widely distributed organisms that lived during only one short period of time and can be used to date specific rock layers
    index fossil

    radioactive dating

    unconformity

    ice core

    45s
  • Q10
    The geologic principle that states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it.

    Unconformity

    Law of Motion

    sedimentary rock

    Law of Superposition
    45s
  • Q11
    A type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions.

    sedimentary rock

    basalt rock

    metamorphic rock

    igneous rock

    45s
  • Q12
    A technique used to determine the actual age of a fossil on the basis of the amount of a radioactive element it contains
    radioactive dating

    index fossil

    ice core

    absolute age

    45s
  • Q13
    The age of a rock or rock layer compared to the ages of other rock layers around it

    absolute age

    Law of Superposition

    relative age

    index fossil

    45s
  • Q14
    A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together

    igneous rock

    metamorphic rock

    basalt rock

    sedimentary rock
    45s
  • Q15
    A place where an old, eroded rock surface is in contact with a newer rock layer.
    unconformity

    sedimentary rock

    fossil

    fault

    45s

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