Geologic History/Relative Dating
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28 QuestionsShow answers
  • Question 1
    45 seconds
    Q. Faults are younger than the rocks they cut. True or False
    answer choices
    True
    False
  • Question 2
    45 seconds
    Q. The Law of Superposition is ________ dating.
    answer choices
    Absolute
    Relative
  • Question 3
    45 seconds
    Q. Which principle or law states that "the processes that shape the world today also operated in the past."
    answer choices
    Uniformitarianism
    Original Horizontality
    Lateral Continuity 
    Superposition 
  • Question 4
    45 seconds
    Q. Which principle or law states that "When layers of sediments are deposited, they settle in flat, horizontal layers."
    answer choices
    Uniformitarianism
    Original Horizontality
    Lateral Continuity 
    Superposition 
  • Question 5
    45 seconds
    Q. What is the time needed for half of a sample of a radioactive substance to undergo radioactive decay?
    answer choices
    Half life
    Isotope
    Radioactive decay
    None of these
  • Question 6
    45 seconds
    Q. Scientists use radioactive decay to measure...
    answer choices
    relative time
    absolute time
    half-lives
    time of day
  • Question 7
    45 seconds
    Q. The original element that undergoes radioactive decay is known as the...
    answer choices
    daughter element
    half-life
    parent element
    carbon-14
  • Question 8
    45 seconds
    Q. Precambrian, Paleozoic, Mesozoic, and Cenozoic all belong to:
    answer choices
    Epochs
    Eras
    Periods
    Eons
  • Question 9
    45 seconds
    Q. Which division of the geologic time scale is the longest?
    answer choices
    Eon
    Period
    Era
    Epoch
  • Question 10
    45 seconds
    Q. The earliest part of Earth's history is called the:
    answer choices
    Cenozoic
    Cambrian
    Holocene
    Precambrian
  • Question 11
    45 seconds
    Q. Which is the correct order for the 3 eras on geologic time scale.  This order is from oldest to current.
    answer choices
    Paleozoic, Mesozoic, Cenozoic
    Mesozoic, Paleozoic, Cenozoic
    Cenozoic, Mesozoic, Paleozoic
  • Question 12
    45 seconds
    Q.

    When is it speculated that Earth first formed?

    answer choices

    ~3.6 billion years ago

    ~4.6 million years ago

    ~4.6 billion years ago

    Last Saturday

  • Question 13
    45 seconds
    Q. The Law of __________ tells us younger rocks are on top.
    answer choices
    Uniform-itarianism
    Congruity
    Positronics
    Superposition
  • Question 14
    45 seconds
    Q. What type of rock do fossils form in?
    answer choices
    Igneous
    Sedimentary
    Metamorphic
    Classic
  • Question 15
    45 seconds
    Q. What type of rock do fossils form in?
    answer choices
    Igneous
    Sedimentary
    Metamorphic
    Classic
  • Question 16
    45 seconds
    Q. What 2 things make a good index fossil?
    answer choices
    Good looks and a great smile
    widespread and on Earth of a short time
    widespread and on Earth for a long time
    only found in Clinton Twp and in every rock layer
  • Question 17
    45 seconds
    Q.

    What type of unconformity is shown between D and C in the figure?

    answer choices

    nonconformity

    disconformity

    angular unconformity

    uniformatarianism

  • Question 18
    120 seconds
    Q.

    A sample of a radioactive element has a mass of 80 g. How much parent and daughter materials are in the sample after two half-lives?

    answer choices

    parent = 20 g; daughter = 60 g

    parent = 80 g; daughter = 80 g

    parent = 2; daughter = 1/2

    parent = 60 g; daughter = 20 g

  • Question 19
    45 seconds
    Q.

    The discovery of fossilized coral reefs on land is evidence that

    answer choices

    salt water changes coral into fossils.

    the sea level has changed over time.

    the reefs formed in a freshwater lake.

    coral reefs can form on dry land.

  • Question 20
    45 seconds
    Q. Which of the following places the divisions of time in order from largest to smallest? 
    answer choices
    epoch, period, era, eon
    period, era, epoch, eon
    era, eon, epoch, period
    eon, era, period, epoch
  • Question 21
    45 seconds
    Q. Radiometric dating is often referred to as 
    answer choices
    total age.
    absolute age.
    historic age.
    geologic age.
  • Question 22
    120 seconds
    Q. A rock formed with 500 atoms of a radioactive parent element, but only contains 125 radioactive parent atoms today.  If the half-life is 1000 years, how old is the rock?
    answer choices
    2000 years
    500 years
    250 years
    125 years
  • Question 23
    45 seconds
    Q. the time it takes for half the atoms in an element to decay into something else is called
    answer choices
    absolute age dating
    relative age dating
    half-life
    extinct
  • Question 24
    45 seconds
    Q. The ______________ era covers almost 90% of earth's history.
    answer choices
    Paleozoic 
    Mesozoic 
    Cenozoic
    Precambrian 
  • Question 25
    45 seconds
    Q. What percent of carbon-14 would be left after 5730 years?
    answer choices
    100%
    75%
    50%
    25%
  • Question 26
    45 seconds
    Q. Relative dating of rock layers tells us that the deeper we dig, _______.
    answer choices
    the younger the rocks get
    the smellier the rocks get
    the harder the rocks get
    the older the rocks get
  • Question 27
    45 seconds
    Q. Gaps in rock layers caused by erosion are called
    answer choices
    law of superposition
    unconformities
    uniformitarianism
    relative dating
  • Question 28
    45 seconds
    Q.

    Which of the following is NOT an uncomformity

    answer choices

    deposition stops after a supply of sediment is cut off

    erosion moves layers

    a break in geologic record

    gravity causes sediment to form layers

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