Absolute Dating Answers
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Which statement explains why carbon-14 dating cannot be used to date ancient rocks?
A
Carbon-14 decays at a varying rate.B
Carbon-14 decays quickly leaving the amount too small to measure.C
Carbon-14 can be used only to date the remains of organisms.D
Carbon-14 has a half-life that is much longer than potassium.2
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Which material undergoes radioactive decay?
A
all elements that have a half-lifeB
all elements that contain atoms with protonsC
all elements that have turned into a new elementD
all elements that have a consistent number of particles3
Which is the correct formula for calculating the age of a meteorite if using half-life?
A
Age of object =
B
Age of object =
C
Age of object =
D
Age of object =
4
Which unstable element is used to determine the age of volcanic rock?
A
argonB
carbon-12C
potassiumD
carbon-145
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.6
The graph shows calculations for potassium-argon dating.
A
They can estimate that all the potassium will have decayed within 6.5 billion years.B
They can tell that 1/8 of the argon gas will be left after 3.9 billion years.C
They can determine that a rock is 1.3 billion years old if 1/2 of the potassium has decayed.D
They can see that potassium’s half-life varies from every 1.3 billion years to every 5.2 billion years.7
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.8
Study the diagram of radioactive decay.
A
atoms and elementsB
elements and gasC
energy and particlesD
gas and atoms9
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.10
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 oldDid you find these answers helpful?
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