Absolute Dating Answers
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Which statement accurately describes radioactive dating?
A
Geologists use only one type of radioactive dating.B
Geologists compare parent and daughter elements to determine rock type.C
Geologists will measure how stable multiple parent elements can decay into multiple daughter elements.D
Geologist compare the observed abundance of naturally occurring radioactive isotopes and their decay products using decay rates.2
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Which phrase describes one characteristic of radioactive elements?
A
are produced in a laboratoryB
decay at a constant rateC
have a consistent number of particlesD
release energy and particles to maintain radioactivity3
Which statement describes what happens to elements during radioactive decay?
A
They release energy.B
They gain new particles.C
They lose energy at a varying rate.D
They have a consistent number of particles.4
Which phrase describes the element carbon-14?
A
decays at an unknown rateB
found in an organism’s remainsC
forms from the breakdown of nitrogen-14D
is measured to determine the age of sedimentary rocks5
Which phrase describes carbon-14 dating?
A
uses the rate at which nitrogen-14 decays into carbon-14B
dates the remains of organisms to determine when they diedC
measures the number of unstable elements in ancient volcanic rocksD
determines the age of ancient fossils older than 50,000 years old6
Which statement explains how determining the age of the remains of living things is similar to dating rocks?
A
Organisms and rocks both contain stable and unstable elements.B
Organisms contain the same unstable elements as those found in rocks.C
Elements in rocks decay at the same rate as elements in the remains of organisms.D
Rocks and organisms both have gases trapped inside that are measured to determine age.7
How is radioactive decay used to date sedimentary rocks?
A
The amounts of potassium and argon in sedimentary rocks are measured.B
The amounts of carbon-14 and nitrogen in sedimentary rocks are measured.C
The amounts of unstable elements in each layer of the sedimentary rocks are compared.D
The amounts of unstable elements in the volcanic layers above and below the sedimentary layers are measured.8
The chart shows rate of decay.
A
years of decayB
quantity of energyC
number of stable atomsD
amount of material that has not decayed9
Which property of argon makes it useful for potassium-argon dating?
A
It decays into potassium.B
It is an unstable element.C
It remains trapped in rock.D
It is useful only for dating newer rock.10
Which unstable element is used to determine the age of volcanic rock?
A
argonB
carbon-12C
potassiumD
carbon-14Did you find these answers helpful?
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