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PS Unit 7 & 8 Review

Total questions: 130

Worksheet time: 5hrs 40mins

Name
Class
Date
1.

List the three types of radioactive decay from least harmful to most harmful that we discussed in class:

(a)  

2.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
3.
A helium nucleus with two protons and two neutrons is called a(n) ____.  
a)
alpha particle
b)
electroscope
c)
beta particle
d)
gamma ray
4.

A radioactive substance decays with a half-life of 12,000 years. If the substance is stored for 36,000 years, then what fraction of it remains?

a)

1/2

b)

1/8

c)

1/24

d)

1/64

5.

An isotope of cesium (cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain?

a)

0.5 mg

b)

0.25 mg

c)

0.125 mg

d)

0.0625 mg

6.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
7.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

8.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
9.
which atom has  4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons
10.
Energy in the sun is produced as a result of nuclear ____ reactions.
a)
fusion
b)
fission
c)
waste
d)
sub
11.
In a nuclear reactor, electricity is produced from what element?
a)
Plutonium
b)
Uranium 235
c)
Radon 220
d)
Lead 232
12.

Solve this equation for beta decay.

614C = ___ + -10e

a)

410Be

b)

714N

c)

210He

d)

613C

13.
Solve this equation for beta decay.
614C = ___ + -10e
a)
410Be
b)
714N
c)
210He
d)
613C
14.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
15.
Balance the following equation:
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
16.
If we start off with element 24X50 after an alpha decay we get another element Y that looks like
a)
22Y50
b)
22Y46
c)
20Y48
d)
26Y54
17.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
18.
Uranium-238  decays into  Thorium-234  by emitting .........
a)
an alpha particle
b)
a beta particle
c)
gamma rays
d)
visible light
19.
After the third half-life, how much of the sample is left?
a)
1/2
b)
1/3
c)
1/16
d)
1/8
20.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
21.
What is the half-life of iodine-131?
a)
32 days
b)
8 days
c)
16 days
d)
24 days
22.

The % of the parent isotope remaining after 1 Half Life.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

23.

The % of the parent isotope remaining after 2 Half Lives.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

24.

Match the following

a)
1.

alpha radiation

b)
2.

beta radiatio

c)
3.

electron

d)
4.

gamma radiation

25.
The most penetrating type of radiation is the ____.  
a)
alpha particle
b)
gamma ray
c)
beta particle
d)
uranium
26.
Negatively charged particles emitted from a nucleus at a high speed are ____.  
a)
alpha particle
b)
gamma rays
c)
beta particles
d)
X rays
27.

Gamma rays _________.

a)

have no mass and no charge

b)

have mass but no charge

c)

have no mass but have charge

d)

have mass and charge

28.

List the three types of nuclear radiation in increasing order of penetrating power.  

a)
  alpha, beta, gamma 
b)
X ray, beta, gamma
c)

gamma, beta, alpha

d)
X ray, gamma, beta 
29.
Alpha particles.....
a)

are positively charged.

b)

consist of two protons and four neutrons.

c)

can penetrate any thickness of matter

d)

All of the above 

30.

Which type of nuclear reaction have people been able to effectively harness for power?

a)

fission

b)

fusion

31.

Which type of nuclear reaction produces larger amounts of energy?

a)

fission

b)

fusion

32.

Which part of the atom is affected by a nuclear reaction?

a)

the electrons in its energy levels

b)

the protons and neutrons at its center

33.

What is the highest-energy type of radioactive decay?

a)

alpha particles

b)

beta particles

c)

positrons

d)

gamma radiation

34.
Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by a piece of paper or clothing.
a)
Alpha
b)
Beta
c)
Gamma
35.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Decay
36.
Which process involves the joining of small nuclei?
a)
Beta decay
b)
Alpha decay
c)
Nuclear fission
d)
Nuclear fusion
37.

What type of radioactive decay is this example?

a)

Alpha

b)

Negative Beta

c)

Positive Beta

d)

Gamma

38.

22087Fr —› 42He + ____

a)

22089Ac

b)

22490Th

c)

21685At

d)

21688Ra

39.

146C —› 0-1e + ____

a)

126C

b)

147N

c)

148O

d)

145B

40.
What is speed?
a)
how far you go
b)
how much distance is covered over a period of time
c)
how fast you accelerate
d)
the change in the location of a object
41.
What is the formula to calculate speed?
a)
Speed = time/distance
b)
Speed = distance/time
c)
Speed = distance x time
d)
Speed = time x distance
42.
Which of the following is a unit for acceleration?
a)
km/s
b)
m/s2
c)
mi/hr
d)
ft
43.
What is velocity?
a)
the quickness of an object
b)
the location of an object
c)
acceleration
d)
speed in a specific direction
44.
A measurement of how fast an object is moving
a)
Velocity
b)
Speed
c)
Vector
d)
Acceleration
45.
A description of the speed and direction of an object's motion
a)
Velocity
b)
Speed
c)
Acceleration
d)
Vector
46.
When a car goes around a corner at 20 mph, why do we say it  accelerates?
a)
The car is accelerating because of the velocity is constant
b)
The car accelerates because it's going 20 mph
c)
Cars always accelerate when they are in motion
d)
The car is accelerating because it's changing direction
47.
Why does a car accelerate as it round a corner at a constant speed?
a)
Its direction changes
b)
It doesn't
c)
It slows down
d)
Its speeds up  
48.
Acceleration only takes place when things speed up. 
a)
True
b)
False
49.
A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?
a)
24 m/s2
b)
18 m/s2
c)
16 m/s2
d)
16 m/s
50.
A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?
a)
0 m/s
b)
40 m/s2
c)
-40 m/s2
d)
40 m/s
51.
Acceleration can be classified as _______________
a)
Speeding up
b)
Slowing Down
c)
Changing directions
d)
All of the above
52.
a)
Object not moving
b)
Object accelerating
c)
Object slowing down
d)
Object at a constant speed
53.
a)

Green object is moving at a faster constant speed than Red

b)

Red object is moving at a faster constant speed than Green

c)

Green object is moving at a slower constant speed than Red

d)

Red object is moving 2 times faster than Green

54.
Which graph shows: A car travelling at a constant speed.
a)
A
b)
B
c)
C
d)
D
55.

Which graph represents slowing down?

a)

A

b)

B

c)

C

d)

D

56.
Which graph represents the greatest acceleration?
a)
A
b)
B
c)
C
d)
D
57.
The graph below represents
a)
Speed
b)
Velocity
c)
Acceleration
d)
Deceleration
58.
In which time interval was the object speeding up?   
a)
between 0 s and 2 s
b)
between 2 s and 4 s
c)
between 6 s and 8 s
d)
between 8 s and 10 s
59.
What is the person doing from 5 seconds to 10 seconds?
a)
Walking 
b)
Running
c)
Standing Still 
d)
Walking Fast
60.

Mrs. Bearden drives 50 miles. What does Mrs. Bearden need to figure out her speed?

a)

The type of car she drives

b)

Her heart rate as she drives

c)

The time she has driven

d)

The direction she was going

61.

Gabriel sprinted down the hallway for a science project. He ran a total of 40 meters in 20 seconds. What was his average speed?

a)

2 meters per second

b)

20 meters per second

c)

40 meters per second

d)

10 meters for second

62.
A truck driver drove his truck for 5 miles. She drove that distance in a total of 20 minutes. What was the truck driver's average speed?
a)
4 miles per minute
b)
0.25 miles per minute
c)
5 miles per minute
d)
0.5 miles per minute
63.
What is the speed of an object that travels 60 meters in 4 seconds?
a)
240 m/s
b)
15 m/s
c)
0.067 m/s
d)
15 mph
64.

Sophia was trying to explaining to Tyler how to find the speed. What equation should she use to calculate speed?

a)

speed = time/distance

b)

speed = distance X time

c)

speed = voleicty X time

d)

speed = distance/time

65.
The unit for speed is:
a)
m/s
b)
s
c)
m
d)
km
66.
Sarah backstrokes at an average speed of 8 meters per second. How long will it take her to complete a 200-meter race?
a)
0.04 s
b)
1600 s
c)
50 s
d)
25 s
67.
If Mike rides his motorcycle at an average speed of 20 m/s for 500 seconds, how far does he ride?
a)
10,000 m
b)
25 m
c)
0.04 m
d)
250 m
68.
An aircraft carrier made a trip to Guam. The trip took four hours at an average speed of 6 km/h. How far did the ship travel?
a)
24 km
b)
1.5 km
c)
0.67 km
d)
5 km
69.
Total distance divided by total time is
a)
average speed
b)
constant speed
c)
instantaneous speed
d)
acceleration
70.
Shona cycles at an average speed of 8km/h. How far has she travelled if she cycles for 4 hours?
a)
55km
b)
32km
c)
43km
d)
32miles
71.
How far will a person go if they jog for 2 hours at a speed of 12 km/hr?
a)
6 km
b)
0.5 km
c)
10 km
d)
24 km
72.
A runners races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?
a)
10 m/s
b)
1000 m/s
c)
100 seconds
d)
10 seconds
73.
What is velocity?
a)
the quickness of an object
b)
the location of an object
c)
acceleration
d)
speed in a specific direction
74.

Which of these objects is NOT accelerating?

a)

A plane slowing down to land

b)

A rocket taking off into space

c)

A hiker moving at the same speed for hours

d)

A rollerblader heading downhill

75.

Billy runs 400 meters to Andy's house, turns around, and runs 400 meters back home. What is Billy's distance?

a)

0 meters

b)

400 meters

c)

800 meters

d)

1600 meters

76.

Billy runs 400 meters to Andy's house, turns around, and runs 400 meters back home. What is Billy's displacement?

a)

0 meters

b)

400 meters

c)

800 meters

d)

1600 meters

77.

Jerry walked from home to school, then from the school to the park. What is his total displacement?

a)

2 km

b)

5 km

c)

8 km

d)

10 km

78.

Jerry walked from home to school, then from the school to the park. What is his total distance?

a)

2 km

b)

5 km

c)

8 km

d)

10 km

79.

From the figure, what is the displacement?

a)

20 meters

b)

25 meters

c)

15 meters

d)

25 meters NE

80.

The change in an objects position from the final position to initial position.

a)

displacement

b)

distance

c)

motion

d)

reference point

81.

Two people walk across a parking lot. Their paths are shown in the image. Who traveled with a larger displacement?

a)

Person A

b)

Person B

c)

They both had the same displacement.

82.
David walks 3 km north, and then turns east and walks 4 km. What is the distance?
a)
7 km
b)
3 km
c)
4 km
d)
1 km
83.
Ronaldo runs across a soccer field, moving 10 meters north, then 8 meters west. His displacement would be:
a)
10.2 m, NW
b)
12.8 m, NW
c)
15.4 m, NW
d)
18.0 m, NW
84.
Because displacement has a magnitude and direction it is called a ______. 
a)
distance
b)
vector
c)
arrow
d)
length
85.
A person walks 50 meters directly north, stops, and then travels 32 meters directly south.  What is their displacement?
a)
82 meters
b)
18 meters
c)
28 meters
86.

Which of the following is correct?

a)

Initial Position = -5 m

Final Position = -5 m

Distance = 22 m

Displacement = 0 m

b)

Initial Position = -5 m

Final Position = -5 m

Distance = 0 m

Displacement = 22 m

c)

Initial Position = -5 m

Final Position = 6 m

Distance = 22 m

Displacement = 0 m

d)

Initial Position = -5 m

Final Position = 6 m

Distance = 0 m

Displacement = 22 m

87.

Which of the following is correct?

a)

Initial Position = -2 m

Final Position = 0 m

Distance = 14 m

Displacement = 2 m

b)

Initial Position = 0 m

Final Position = -2 m

Distance = 14 m

Displacement = -2 m

c)

Initial Position = -2 m

Final Position = 0 m

Distance = -2 m

Displacement = -2 m

d)

Initial Position = -2 m

Final Position = 0 m

Distance = 14 m

Displacement = 14 m

e)

None are correct.

88.

David walks 3 km north, and then turns east and walks 4 km. What is the displacement?

a)

1 km

b)

3 km

c)

4 km

d)

5 km

89.

What distance did the creature travel?

a)

23 m

b)

9 m

c)

-9 m

d)

-23 m

90.

What is the creature's final displacement?

a)

23 m

b)

9 m

c)

-9 m

d)

-23 m

91.
Object C had an initial position of 2 m and a final position of 10 m. The displacement of object C can be shown with this equation: Displacement = final position - initial position
What was the displacement of object C?
a)
+6 m
b)
+8 m
c)
-4 m
d)
-2 m
92.
Object B had an initial position of 12 m and a final position of 7 m. The displacement of object C can be shown with this equation: Displacement = final position - initial position
What was the displacement of object B?
a)
+5 m
b)
- 6 m
c)
-5 m
d)
+6 m
93.
What was the total distance traveled by object C?
a)
8 m
b)
10 m
c)
12 m
d)
14 m
94.

Which is the length of the path an object has traveled?

a)

displacement

b)

distance

c)

motion

d)

reference point

95.
Acceleration occurs when an object changes its speed or ______.
a)
direction
b)
force
c)
inertia
d)
mass
96.
Acceleration occurs when an object changes its speed or ______.
a)
direction
b)
force
c)
inertia
d)
mass
97.
Which runner stopped for a rest?
a)
Albert
b)
Bob
c)
Charlie
98.
Which runner won the race?
a)
Albert
b)
Bob
c)
Charlie
99.
Velocity is
a)
speed and acceleration
b)
constant speed
c)
a frame of reference
d)
speed in a given direction
100.
A car driving at 50 miles per hour drives for 2 hours. What distance did it cover?
a)
50 miles
b)
25 miles
c)
100 miles
d)
75 miles
101.
What does this graph represent?
a)
Constant Speed
b)
Acceleration
c)
Not moving
102.
What does this graph represent?
a)
Constant speed
b)
Acceleration
c)
Not moving
103.

What is happening between 2 and 3 seconds?

a)

The object is not moving.

b)

The object is not accelerating.

c)

The object is slowing down.

d)

The object is speeding up.

104.

What is happening between 2 and 3 seconds?

a)

The object is not moving.

b)

The object is not accelerating.

c)

The object is slowing down.

d)

The object is speeding up.

105.
What is happening at E?
a)
Stationary
b)
Accelerating
c)
Fast steady speed; moving away from the starting position
d)
Steady speed; returning to start position
106.
Which line represents an object moving at a faster speed?
a)
A
b)
B
107.
This graph demonstrates an object that is -
a)
At a constant speed
b)
Increasing speed
c)
Decreasing speed
d)
Stationary
108.
This graph demonstrates an object that is -
a)
At a constant speed
b)
Increasing speed
c)
Decreasing speed
d)
Stationary
109.
This graph demonstrates an object that is -
a)
At a constant speed
b)
Increasing speed
c)
Decreasing speed
d)
Stationary
110.
This graph demonstrates an object that is -
a)
At a constant speed
b)
Increasing speed
c)
Decreasing speed
d)
Stationary
111.
This is a velocity-time graph.  What is the object doing in segment B?
a)
Positive acceleration
b)
Negative acceleration
c)
Constant Velocity
d)
Not moving
112.

What is the formula for speed?

a)

speed = distance x time

b)

speed=distance / time

c)

speed = time / distance

d)

speed = distance + time

113.
Which graph is showing acceleration (getting faster)
a)
D
b)
E
c)
both D and E
d)
neither D or E
114.
How long did it take this object to travel 10 m?
a)
0 s
b)
10 s
c)
15 s
d)
20 s
115.
At 60 seconds, how far had this object traveled? 
a)
0 m
b)
10 m
c)
20 m
d)
40 m
116.
a)

1

b)

2

c)

3

d)

All of the above

117.

Which law best describes inertia

a)

1

b)

2

c)

3

d)

All of the above

118.
a)

1

b)

2

c)

3

d)

All of the above

119.
a)

1

b)

2

c)

3

d)

All of the above

120.
a)

1

b)

2

c)

3

d)

All of the above

121.
a)

1

b)

2

c)

3

d)

All of the above

122.
a)

1

b)

2

c)

3

d)

All of the above

123.
a)

1

b)

2

c)

3

d)

All of the above

124.

Object at rest stays at rest

a)

1

b)

2

c)

3

d)

All of the above

125.

F=MxA

a)

1

b)

2

c)

3

d)

All of the above

126.

Acceleration is due to a force put on an object mass

a)

1

b)

2

c)

3

d)

All of the above

127.

Action / reaction

a)

1

b)

2

c)

3

d)

All of the above

128.

Equal and opposite

a)

1

b)

2

c)

3

d)

All of the above

129.

. Force exerted between the surfaces of two objects.

a)

Friction

b)

Inertia

c)

Forces

d)

Gravity

130.

Object tendency to resist change

a)

Friction

b)

Inertia

c)

Forcé

d)

Gravity

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