Absolute Dating Answers

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Which statements about radioactive decay are true? Check all that apply.Most elements are unstable.Radioactive decay happens when one kind of atom becomes another kind.Radioactive elements occur in nature.All elements have the same rate of decay.Carbon-14 decays into nitrogen-14.

A
Most elements are unstable.
B
Radioactive decay happens when one kind of atom becomes another kind.
C
Radioactive elements occur in nature.
D
All elements have the same rate of decay.
E
Carbon-14 decays into nitrogen-14.
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✔ unstablebalanced stable unbalanced

A
✔ unstable
B
balanced
C
stable
D
unbalanced
3

changing slow ✔ constant

A
changing
B
slow
C
✔ constant
4

radioactive basic ✔ stable

A
radioactive
B
basic
C
✔ stable
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Use the drop-down menus to select the correct answers to complete the paragraph.

Answers:
The building blocks of matter are called . A substance made up of the same kind of atoms is called a(n) . elements lose particles. This makes them .:atoms
The building blocks of matter are called . A substance made up of the same kind of atoms is called a(n) . elements lose particles. This makes them .:element
The building blocks of matter are called . A substance made up of the same kind of atoms is called a(n) . elements lose particles. This makes them .:Unstable
The building blocks of matter are called . A substance made up of the same kind of atoms is called a(n) . elements lose particles. This makes them .:radioactive
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particle✔ elementmaterial

A
particle
B
✔ element
C
material
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Stable ✔ UnstableSolid

A
Stable
B
✔ Unstable
C
Solid
139223

unnatural✔ radioactivemagnetic

A
unnatural
B
✔ radioactive
C
magnetic
139224

A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down menus to complete each statement about the element.

Answers:
It will take years for half of the sample to decay.:63
In 189 years, of the sample will be left.:one-eighth
Scientists can figure out how old a sample is by multiplying the by the length of the half-life.:number of half-life cycles
139225

one-half✔ one-eighthone-sixteenth

A
one-half
B
✔ one-eighth
C
one-sixteenth
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✔ number of half-life cyclesyearsweight of the sample

A
✔ number of half-life cycles
B
years
C
weight of the sample
174376

✔ 2.6 billion years3.9 billion years5.2 billion years

A
✔ 2.6 billion years
B
3.9 billion years
C
5.2 billion years
174377

2.6 billion years3.9 billion years✔ 5.2 billion years

A
2.6 billion years
B
3.9 billion years
C
✔ 5.2 billion years
174378

2.6 billion years✔ 3.9 billion years5.2 billion years

A
2.6 billion years
B
✔ 3.9 billion years
C
5.2 billion years
174379

Which statements describe the image? Check all that apply.

A
The wood is releasing argon gas.
B
This information is useful for dating ancient rock.
C
The process works only with organic matter.
D
The element has a half-life of 5,730 years.
E
This shows the half-life of carbon-19.
174380

✔ igneousmetamorphic sedimentary

A
✔ igneous
B
metamorphic
C
sedimentary
174381

Which object would a geologist date using carbon-14 dating?

A
a fossil of a dinosaur that existed 200 million years ago
B
a woolly mammoth fossil that existed 15,000 years ago
C
an ancient volcanic rock that is 100,000 million years old
D
an igneous rock that is 95,000 years old
174382

How would a geologist use absolute dating to determine the age of sedimentary layers?

A
by dating the age of several radioactive elements in a sedimentary rock layer
B
by dating the age of intrusions and extrusions near a sedimentary rock layer
C
by comparing the relative ages of several sedimentary rock layers
D
by identifying fossils in nearby intrusion and extrusions and determining their age
174383

elementsparticles✔ atoms

A
elements
B
particles
C
✔ atoms

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