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Nuclear Energy

Total questions: 39

Worksheet time: 40mins

Name
Class
Date
1.

The time required for half of the parent isotope to decay into daughter isotopes.

a)

Absolute Age

b)

Relative Age

c)

Fossil

d)

Half-life

2.
According to the graph, what fraction of the original parent isotope still exists after 3 half lives?
a)
0,5000 g
b)
0,2500 g
c)
0,1250 g
d)
0.0625 g
3.
Using ESRT (A) [Radioactive Decay Data], what is the half-life in standard notation of carbon-14?
a)
5,700 years
b)
57,000 years
c)
570,000 years
d)
5,700,000 years
4.
Using ESRT (A) [Radioactive Decay Data], what is the half-life in standard notation of Uranium-238?
a)
4,500 years
b)
450,000 years
c)
4,500,000 years
d)
4,500,000,000 years
5.
The graph shows the radioactive decay of a 50-gram sample of a radioactive isotope. 
 According to the graph, what is the half-life of this isotope? 
a)
100 years
b)
150 years
c)
200 years
d)
300 years
6.
The graph shows the decay of a radioactive material over time. 
 How long does it take for this radioactive material to decay through 2 half-lives? 
a)
1 x 103 years
b)
5 x 103 years
c)
10 x 103 years
d)
40 x 103 years
7.

What percentage of the original isotope is left after 2 half-lives?

a)

100%

b)

75%

c)

50%

d)

25%

8.
If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives?
a)
25 years
b)
200 years
c)
400 years
d)
800 years
9.
The graph shows the generalized rate of decay of radioactive isotopes over 5 half-lives. 
 If the original mass of a radioactive isotope was 24 grams, how many grams would remain after 3 half-lives? 
a)
12
b)
24
c)
3
d)
6
10.
Radiometric dating is possible because the rates of decay of radioactive isotopes _____.
a)
change over time
b)
change from place to place
c)
are constant
d)
vary widely
11.
When an unstable radioactive atom decays, it usually turns into:
a)
a more stable atom
b)
a less stable atom
c)
the exact same atom but with less pure energy
d)
empty space
12.
You find a rock sample with radioactive atoms present.  If 12.5% of the original radioactive atoms were present, how many half-lives has the rock been around for? (Hint, at Half-Life = 0, you start with 100%)
a)
zero
b)
1
c)
2
d)
3
13.
You find a rock sample with radioactive atoms present.  If 25% of the original radioactive atoms were present, how many half-lives has the rock been around for? (Hint, at Half-Life = 0, you start with 100%)
a)
zero
b)
1
c)
2
d)
3
14.
Suppose you found a material in which 12.5% of the original radioactive atoms were still present.  If the half-life of an atom is 60 years, how old is the material?
a)
30 years old
b)
60 years old
c)
120 years old
d)
180 years old
15.
If the  half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been ten half-lives?
a)
10 years
b)
100 years
c)
1000 years
d)
10000 years
16.
The table shows the radioactive decay of carbon-14. Part of the table has been left blank. 
 After 22,800 years, approximately what percentage of the original carbon-14 remains? 
a)
15%
b)
12.5%
c)
6.25%
d)
3.125%
17.
The graph shows the generalized rate of decay of radioactive isotopes over 5 half-lives. 
 If the original mass of a radioactive isotope was 24 grams, how many grams would remain after 3 half-lives? 
a)
12
b)
24
c)
3
d)
6
18.
Which radioactive isotope takes the greatest amount of time to undergo radioactive decay? 
a)
Carbon-14
b)
Potassium-40
c)
Uranium-238
d)
Rubidium-87
19.

Nuclear power is created by the process of . . .

a)

nuclear fusion

b)

nuclear fission

c)

atomic separation

d)

atom synopsis

20.

What element is used for nuclear energy / bombs?

a)

Einsteinium

b)

Radium

c)

Potassium

d)

Uranium

21.

Nuclear power today uses the energy to . . .

a)

turn turbines by splitting atoms

b)

turn turbines by creating steam from the heat

c)

turn turbines by using temperature differences between fuel rods and water

d)

heating up electrons to move fast enough to create electricity

22.

What is the biggest problem with testing bombs?

a)

Nuclear clouds

b)

Weather change

c)

Radiation from nuclear fallout

d)

nuclear blast

23.

Benefit of nuclear power includes . . .

a)

No air pollution

b)

endless energy created by fuel rods

c)

doesn't have risk of exploding

d)

substance to make it is highly available and not rare

24.

What is considered the worst nuclear disaster ever?

a)

Fukushima

b)

Three Mile Island

c)

Chernobyl

25.
Splitting a uranium atom is called - 
a)
fission
b)
fusion
26.
Barium-122 has a half-life of 5 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?
a)
0.25g
b)
2.0g
c)
20g
d)
40g
27.
When Cesium-137 undergoes radioactive decay it emits a beta particle. What isotope will result from this decay?
a)
Cesium 136
b)
Barium 137
c)
Iodine 133
d)
Cesium 137
28.

site of the worst nuclear accident in the

United States

a)

Chernobyl

b)

Three Mile Island

c)

Fukushima

d)

Manhattan Project

29.

Storage sites for nuclear wastes

a)

should be located only in areas that are extremely geologically stable.

b)

will always leak lethal amounts of radioactivity.

c)

can only be located only in mountain ranges.

d)

should be able to undergo the process of transmutation.

30.

This nuclear accident occurred due the events of an earthquake followed by a tsunami striking the nuclear reactor on March 11, 2011. The cooling systems of this reactor were crippled causeing a meltdown.

a)

Chernobyl

b)

Fukushima

c)

Three Mile Island

d)

Manhattan Project

31.

Which of the following statements below is NOT a true statement about nuclear power?

a)

produces no air pollution

b)

nuclear power plants are safer than coal power plants.

c)

nuclear waste must be stored for thousands of years.

d)

nuclear energy is very cheap, easy to build and easy to maintain.

32.

What causes the turbine blades to rotate in a nuclear power plant?

a)

heat

b)

steam

c)

water

d)

uranium

33.
How do nuclear power-plants work?
a)
Fusion
b)
Half-life
c)
Fission
d)
Fusion or fission
34.
Where does fusion occur naturally?
a)
Underwater
b)
All around us
c)
In the radioactive waste
d)
On the sun
35.
An example of an uncontrolled fission reaction is _______________
a)
Nuclear power plants
b)
Radio active decay
c)
Atomic Bomb
d)
On the surface of the sun
36.
Why do scientists most want to learn more about fusion?
a)
To win the Nobel prize
b)
To make energy for people to use
c)
To destroy the world
d)
To know more about stars
37.
The major drawback to nuclear fission reactors is the difficulty of achieving safe disposal of radioactive waste products.
a)
true
b)
false
38.
Requires temperatures of millions of degrees?
a)
Fission
b)
Fusion
39.
Which of the following is true about nuclear fusion?
a)
It is easy to implement.
b)
It produces less energy than nuclear fission.
c)
It produces more energy than nuclear fission.
d)
It has the ability to occur easily in everyday life.

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