Absolute Dating Answers

10 verified answers
1
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Which phrase describes carbon-14 dating?

A
uses the rate at which nitrogen-14 decays into carbon-14
B
dates the remains of organisms to determine when they died
C
measures the number of unstable elements in ancient volcanic rocks
D
determines the age of ancient fossils older than 50,000 years old
4

Which phrase describes the element carbon-14?

A
decays at an unknown rate
B
found in an organism’s remains
C
forms from the breakdown of nitrogen-14
D
is measured to determine the age of sedimentary rocks
6

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.
7

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.
8

The chart shows rate of decay.

Question illustration
A
years of decay
B
quantity of energy
C
number of stable atoms
D
amount of material that has not decayed
9

Study the diagram of radioactive decay.

Question illustration
A
atoms and elements
B
elements and gas
C
energy and particles
D
gas and atoms
10

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.

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