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Grade 8 Physics

Total questions: 105

Worksheet time: 57mins

Name
Class
Date
1.

What is this symbol?

a)

Cell

b)

Battery

c)

Motor

d)

Wire

2.

What is this Symbol?

a)

Wire

b)

Cell

c)

Open Switch

d)

Buzzer

3.

What is this symbol?

a)

Cell of batteries

b)

Wire

c)

Cell

d)

Lamp

4.

What is this symbol?

a)

Voltmeter

b)

Lamp

c)

Cell

d)

Battery

5.

What is this Symbol?

a)

Voltmeter

b)

Resistor

c)

Motor

d)

Ammeter

6.

What is this Symbol?

a)

Wire

b)

Resistor

c)

Switch

d)

Battery

7.

What is this Symbol?

a)

Wire

b)

Switch

c)

Battery

d)

Switch

8.

In the cell symbol the long line represents the ..........

a)

Positive Terminal

b)

Negative Terminal

c)

Motor

d)

None of the above

9.

In the cell symbol the short line represents the ............

a)

Negative Terminal

b)

None of the above

c)

Positive Terminal

d)

Buzzer

10.

This is an open switch.

a)

True

b)

False

11.

In physics a battery contains ........

a)

One cell

b)

Two or more cells

c)

Microsoft teams

d)

A tennis ball

12.

Why does the lamp not work?

a)

Because the switch is open

b)

Because the battery is not charged

c)

Because there is a gap

d)

Because the lamp is broken

13.

Will this circuit work?

a)

Yes

b)

No

c)

None of the above

14.

Why is electrical wiring usually made from copper?

a)

Because copper looks like food

b)

Because copper conducts electricity

c)

Because copper is not magnetic

d)

Because copper insulates electricity

15.

Why is electrical wires usually covered in plastic?

a)

To make it look pretty

b)

Because its an insulator and it wll make it safe

c)

Because its a conductor and it will mak the electricity flow

d)

To add more energy

16.

What is an electrical circuit?

a)

Alot of wires

b)

A broken path that electric charges can flow

c)

A circuit board

d)

A complete, unbroken path through which electric charges flow

17.

What type of circuit is this an image of?

a)

series circuit

b)

parallel circuit

18.

Will the light bulbs light up in this image?

a)

Yes, both of them will

b)

Yes, but only the one on the right

c)

No, neither of them will

d)

Yes, but only the one on the left

19.

If a circuit is OPEN...

a)

the circuit is complete and the light will work.

b)

the circuit is broken and the light will NOT work

c)

the circuit is a series circuit

20.

What are the three components needed for a complete circuit?

a)

wire, load, energy source

b)

wire, switch, load

c)

wire, switch, energy source

21.

A series circuit...

a)

has a single path for energy to flow

b)

has multiple paths for energy to flow

c)

has a single load

22.

A battery can be a ______________ in an electric circuit.

a)

energy source

b)

load

c)

switch

23.

A complete, unbroken path that allows electricity to flow is called a ___________ circuit.

a)

open

b)

closed

c)

parallel

24.

The buildup or electrical charges is called ________. It is what makes clothes stick together.

a)

static electricity

b)

charged particles

25.

What type of circuit is this?

a)

parallel circuit

b)

series circuit

c)

open circuit

d)

closed circuit

26.

What type of circuit is shown?

a)

series circuit

b)

open circuit

c)

parallel circuit

27.

Will the light bulb light in this circuit?

a)

Yes

b)

No

28.

Is a plastic fork an insulator or conductor?

a)

insulator

b)

conductor

29.

Is a paperclip an insulator or a conductor?

a)

insulator

b)

conductor

30.

Which of the following is an insulator?

a)

nail

b)

screw

c)

cardboard

d)

copper sheet

31.

When ___________ and __________ charges are not balanced they can cause object to attract to one another.

a)

positive, positive

b)

positive, negative

c)

negative, negative

32.

Which of the following is a conductor?

a)

plastic chip

b)

yarn

c)

brass ring

d)

paper

33.

Electric circuits are divided in two:

a)

Pheanas and Ferb

b)

Series and parallel

c)

Electrons and protones

d)

Batman and Robin

34.

In a series circuit the electricity

a)

passes through each part of the circuit in the same direction

b)

Passes though electric cables in different directions

c)

passes through your body

d)

passes through the space and the Sun

35.

In a parallel circuit the current

a)

passes though electric cables that go in different directions

b)

passes through emotional moments

c)

passes through each part of the circuit in the same direction

d)

passes by your house

36.

An electric circuit is made up of

a)

Cookies and cream

b)

electrons, protons and neutrons

c)

rice and potato salad

d)

A generator, cables,a receptor and a switch

37.

This symbol represents "Electric cable or wire"

a)
b)
c)
d)
38.

This symbol represents a lightbulb

a)
b)
c)
d)
39.

This symbol represents a switch

a)
b)
c)
d)
40.

This symbol represents a generator or battery

a)
b)
c)
d)
41.

Which image shows a series circuit

a)
b)
c)
d)
42.

Which image shows a parallel circuit

a)
b)
c)
d)
43.

Which images show parallel circuits

a)
b)
c)
d)
44.

English doctor who first used the word "electricity" was

a)

Thales of Miletus

b)

Felipe Andres Bejarano

c)

Luigi Galvani

d)

William Gilbert

45.

Italian Scientist who invented the first electric battery

a)

Sofia Medina

b)

Thomas Edison

c)

Alejandro Niño

d)

Alessandro Volta

46.

American Scientist who invented the lightbulb

a)

Valerie King

b)

Thomas Alba Edison

c)

Thomas Vela Edison

d)

Samuel Morse

47.

The electrical network in my house is a

a)

Series circuit

b)

Short circuit

c)

Formula 1 circuit

d)

Parallel circuit

48.

The following image is an example of a series circuit

a)
b)
c)
d)
49.

Which images are examples of electricity transformed into light

a)
b)
c)
d)
50.

The microwave is an example of electricity transformed into

a)

Motion

b)

Light and heat

c)

Sushi

d)

Wind energy

51.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
52.
Has the symbol
a)
Alpha
b)
Beta 
c)
Gamma
53.
Has a mass of 4 and a charge of +2
a)
Alpha
b)
Beta
c)
Gamma
54.
This is the symbol for a(n)
a)
alpha particle
b)
beta particle
c)
gamma particle
55.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
56.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
57.
How is nuclear fusion different from nuclear fission?
a)
In fusion, the product is a larger atomic nucleus.
b)
Fission produces energy but fusion does not.
c)
Fusion produces energy but fission does not.
d)
In fission, the product is a larger atomic nucleus.
58.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
59.
This is an example of ---
a)
Radioactive Decay
b)
Nuclear Fission
c)
Nuclear Fusion
d)
Fossil fuel reaction
60.
Which type of nuclear radiation is being emitted here?
a)
alpha
b)
beta
c)
gamma
d)
none
61.
What particle completes this reaction?
a)
alpha particle
b)
beta particle
c)
gamma particle
d)
neutron
62.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
63.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
64.
This is the symbol for a(n)
a)
alpha particle
b)
beta particle
c)
gamma particle
65.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
66.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
67.
Which type of nuclear radiation is being emitted here?
a)
alpha
b)
beta
c)
gamma
d)
none
68.
What particle completes this reaction?
a)
alpha particle
b)
beta particle
c)
gamma particle
d)
neutron
69.

Why does beta decay occur?

a)

The nucleus is too large to be stable

b)

The proton to neutron ratio is unstable

c)

The nucleus is in an excited state. This usually follows other types of decay.

70.
The three types of nuclear radiation in increasing order of penetrating power are ____.  
a)
  alpha, beta, gamma 
b)
X ray, beta, gamma
c)
alpha, gamma, beta 
d)
X ray, gamma, beta 
71.

Which of the following types of radioactive decay emits 2 protons and 2 neutrons?

a)

Alpha

b)

Beta

c)

Gamma

72.

Which force holds protons and neutrons together in the atom nucleus?

a)

electric force

b)

gravity

c)

strong nuclear force

d)

weak nuclear force

73.

Which best represents nuclear fission?

a)

F

b)

G

c)

H

d)

J

74.

Which of these diagrams represents the type of nuclear reaction that produces energy in the Sun?

a)

A

b)

B

c)

C

d)

D

75.

What is the term for an ongoing series of nuclear reactions?

a)

fission

b)

chain reaction

c)

fusion

d)

nuclear

76.

Nuclear fission of uranium-235 can start a chain reaction by

a)

releasing enough thermal energy to start nuclear fission in neighboring atoms

b)

producing two smaller atoms that can then strike and split neighboring atoms

c)

producing neutrons that can then strike and split neighboring atoms

d)

combining two atoms with low mass to form one large atom

77.

In the Sun, hydrogen atoms fuse together to form _________.

a)

helium

b)

mercury

c)

oxygen

d)

nitrogen

78.

Plutonium (of mass number 240 and proton number 94) decays with the emission of alpha-particle. What is the new proton number and mass number of the new nucleus?

a)

proton number = 92, mass number = 236

b)

proton number = 92, mass number = 240

c)

proton number = 91, mass number = 240

d)

proton number = 91, mass number = 236

79.

The radioactive nucleus Rubidium (of mass number 87 and proton number 37) decays with the emission of a beta-particle. How many protons and neutrons are left in the nucleus?

a)

protons = 37, neutrons = 49

b)

protons = 37, neutrons = 50

c)

protons = 38, neutrons = 49

d)

protons = 38, neutrons = 87

80.

What type of nuclear reaction occurs in the Sun?

a)

nuclear fission

b)

alpha decay

c)

nuclear fusion

d)

beta decay

81.

Nuclear power plants work by

a)

fusion

b)

fission

c)

fusion and fission

d)

coal

82.

Which force holds protons and neutrons together in the atom nucleus?

a)

electric force

b)

gravity

c)

strong nuclear force

d)

weak nuclear force

83.

Which best represents nuclear fission?

a)

F

b)

G

c)

H

d)

J

84.

Which of these diagrams represents the type of nuclear reaction that produces energy in the Sun?

a)

A

b)

B

c)

C

d)

D

85.

A high temperature is required for which to occur?

a)

alpha decay

b)

beta decay

c)

nuclear fission

d)

nuclear fusion

86.

During nuclear fission, a nucleus _________.

a)

grows

b)

divides

c)

shrinks

d)

combines with another

87.

Only nuclei with _________ atomic numbers can undergo fission.

a)

small

b)

even

c)

odd

d)

large

88.

What is the term for an ongoing series of nuclear reactions?

a)

fission

b)

chain reaction

c)

fusion

d)

nuclear

89.

When two smaller nuclei come together, it is called ________.

a)

nuclear fission

b)

nuclear fusion

c)

chain reaction

d)

critical mass

90.

In the Sun, hydrogen atoms fuse together to form _________.

a)

helium

b)

mercury

c)

oxygen

d)

nitrogen

91.

Nuclear fission of uranium-235 can start a chain reaction by

a)

releasing enough thermal energy to start nuclear fission in neighboring atoms

b)

producing two smaller atoms that can then strike and split neighboring atoms

c)

producing neutrons that can then strike and split neighboring atoms

d)

combining two atoms with low mass to form one large atom

92.

What type of nuclear reaction is shown?

a)

fusion

b)

fission

c)

chain reaction

d)

alpha radiation

93.

What type of relationship did Einstein state there was between energy and mass?

a)

equal

b)

inverse

c)

additional

d)

negative

94.

Which force holds protons and neutrons together in the atom nucleus?

a)

electric force

b)

gravity

c)

strong nuclear force

d)

weak nuclear force

95.

Which best represents nuclear fission?

a)

F

b)

G

c)

H

d)

J

96.

Which of these diagrams represents the type of nuclear reaction that produces energy in the Sun?

a)

A

b)

B

c)

C

d)

D

97.

A high temperature is required for which to occur?

a)

alpha decay

b)

beta decay

c)

nuclear fission

d)

nuclear fusion

98.

During nuclear fission, a nucleus _________.

a)

grows

b)

divides

c)

shrinks

d)

combines with another

99.

Only nuclei with _________ atomic numbers can undergo fission.

a)

small

b)

even

c)

odd

d)

large

100.

What is the term for an ongoing series of nuclear reactions?

a)

fission

b)

chain reaction

c)

fusion

d)

nuclear

101.

When two smaller nuclei come together, it is called ________.

a)

nuclear fission

b)

nuclear fusion

c)

chain reaction

d)

critical mass

102.

In the Sun, hydrogen atoms fuse together to form _________.

a)

helium

b)

mercury

c)

oxygen

d)

nitrogen

103.

Nuclear fission of uranium-235 can start a chain reaction by

a)

releasing enough thermal energy to start nuclear fission in neighboring atoms

b)

producing two smaller atoms that can then strike and split neighboring atoms

c)

producing neutrons that can then strike and split neighboring atoms

d)

combining two atoms with low mass to form one large atom

104.

What type of nuclear reaction is shown?

a)

fusion

b)

fission

c)

chain reaction

d)

alpha radiation

105.

What type of relationship did Einstein state there was between energy and mass?

a)

equal

b)

inverse

c)

additional

d)

negative

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