Absolute Dating Answers
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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 particles2
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The chart shows rate of decay.
A
years of decayB
quantity of energyC
number of stable atomsD
amount of material that has not decayed3
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.4
Which stable element is used to determine the age of volcanic rock?
A
argonB
carbon-14C
potassiumD
carbon-125
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 radioactivity6
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 unstable element is used to determine the age of volcanic rock?
A
argonB
carbon-12C
potassiumD
carbon-148
Which values do scientists compare when using potassium-argon dating?
A
the number of stable and unstable parent atomsB
the number of non-decayed elements left in the rockC
the amount of parent and daughter material trapped in the rockD
the amount of gas from the decayed material that has escaped from rock9
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 old10
What is the age of a meteorite if potassium-40 decayed from 80 g to 10 g? The half-life of potassium-40 is 1.3 billion years.
A
1.3 billion yearsB
2.6 billion yearsC
3.9 billion yearsD
5.2 billion yearsDid you find these answers helpful?
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