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Chapter 15 and 16 REVIEW

Total questions: 85

Worksheet time: 50mins

Name
Class
Date
1.

Magnetism is a charge

a)

True

b)

False

2.

Magnetism is a force of repulsion or attraction caused by movement of charged particles.

a)

True

b)

False

3.

Magnetic poles can be isolated

a)

True

b)

False

4.

A freely suspended magnet points in a east-west direction

a)

True

b)

False

5.

When a magnet breaks in half, one end will have north pole and the other end will have a south pole

a)

True

b)

False

6.

A magnet has to touch a paper to attract it

a)

True

b)

False

7.

The space around a magnet in which a magnetic force is exerted is called a magnetic field

a)

True

b)

False

8.

You can see and touch a magnetic field

a)

True

b)

False

9.

Earth is a huge magnet

a)

True

b)

False

10.

ALL metals are attracted to magnets?

a)

True

b)

False

11.

What types of metals are attracted to a magnet?

a)

Steel

b)

Iron

c)

Nickel

d)

All of the above are attracted to magnets

12.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
13.

WHERE is the strongest attraction force of the magnet?

a)

at the poles

b)

in the middle

c)

above the magnet

d)

below the magnet

14.

Which object would a magnet attract?

a)

a glass bottle

b)

a piece of paper

c)

a steel paper clip

d)

a rubber eraser

15.
A magnet will attract scissors if the scissors contain: 
a)
copper
b)
aluminum
c)
gold
d)
nickel
16.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
17.
Which is not a property of all magnets?
a)
Has a magnetic field
b)
exerts forces
c)
has 2 magnetic poles
d)

has 2 geographic poles

18.
Inside of magnets there are tiny magnets called _______
a)
atoms
b)
domains
c)
mini magnets
19.
If the end of an unknown magnet sticks to a magnet pole labeled "North" the unknown end must be...
a)
North
b)
South
c)
East 
d)
West
20.
Electricity can be used to create a magnet
a)
True
b)
False
21.
A Magnet can be used to create electricity
a)
True
b)
False
22.

Magnetism is a force of ____________________________ that occurs between two _____________ objects.

a)

attraction or repulsion, magnetic

b)

external or internal, magnetic

c)

external or repulsion, electronic

d)

attraction or internal, electronic

23.

The magnetic ____________ around a bar magnet is shown above.

a)

legs

b)

flowers

c)

field

d)

direction

24.

In magnetic materials, all of the ________ are pointing in the same direction.

a)

doors

b)

electrons

c)

domains

d)

orbits

25.

Every magnet has both a _________ pole and a __________ pole.

a)

North, South

b)

East, West

c)

Positive, Negative

d)

Positive, South

26.

Some objects that normally aren't magnetic can become magnetized when connected to a circuit. Items that are magnetized in this way are called ________.

a)

electromagnets

b)

electrons

c)

electrochromic devices

d)

permanent magnets

27.

Although magnetic fields are _____________, one common way that people investigate them is to use ________ filings.

a)

invisible, iron

b)

touchable, iron

c)

invisible, plastic

d)

touchable, plastic

28.
A magnet cannot not move which of the following objects?
a)
a paper clip
b)
a nail
c)
a toothpick
d)
a staple
29.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.
30.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
31.
When two magnets repel, they ________________
a)
change color
b)
pull together
c)
push apart
d)
get colder
32.
What characteristics do magnetic substances have?
a)
They can give you a "shock" when you touch them
b)
They can push or pull objects without touching them
c)
They are always black and cold to touch
d)
They fall faster than other objects when you drop them
33.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
34.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
35.

What are the microscopic regions of atoms with a commonly aligned magnetic field called?

a)

micromagnets

b)

amps

c)

magnetic zones

d)

magnetic domains

36.
What is an electromagnet?
a)
a magnet that creates an electric current
b)
a magnet created by an electric current
c)
a magnet that has an electric charge
d)
an electric charge that is magnetic
37.
NICKEL
Magnetic or
Non-Magnetic?
a)
magnetic
b)
non-magnetic
38.
GLASS
Magnetic or Non-Magnetic?
a)
magnetic
b)
non-magnetic
39.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
40.
In un-magnetized materials the domains are __________ aligned.
a)
super
b)
slightly
c)
randomly
d)
always
41.

Which statement is true?

a)

All Magnets have a North and South Pole

b)

All magnets can attract large objects

c)

Magnets can not pull through Solids.

d)

All Magnets have the Same shape and Size

42.
What subatomic particle causes magnetism in an atom? 
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
43.
Which metals are attracted to magnets? 
a)
iron, nickel, cobalt
b)
gold, silver, platinum
c)
copper, magnesium, aluminum
44.
This substance is
a)
magnetized
b)
unmagnetized
c)
positively charged
d)
negatively charged
45.
You know this substance is magnetized because
a)
all the domains have right angles
b)
the arrows are drawn in red
c)
the domains are aligned
d)
the domains are random
46.

Magnetic field lines always connect _________ poles

a)

Like

b)

Opposite

47.

Which image shows magnets being attracted to each other?

a)
b)
48.

The earth's north pole is the magnetic _____________

a)

North

b)

South

c)

East

d)

West

49.

Magnetic field lines always go from the ____________ to the ___________

a)

South to south

b)

North to north

c)

North to south

d)

South to north

50.

All magnets are affected by Earth's magnetic field

a)

True

b)

False

51.

A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.

a)

calculator

b)

ruler

c)

compass

d)

map

52.

The geomagnetic North pole is near the geographic southepole

a)

True

b)

False

53.

The geomagnetic South pole is near the geographic south pole

a)

True

b)

False

54.

The magnetic induction line of the geomagnetic field starts from the north pole and returns the the south pole

a)

True

b)

False

55.

______is the first country in the world where people began to study the magnetic phenomenon.

a)

China

b)

USA

c)

Egypt

d)

Canada

56.

The magnetic field of the Earth...

a)

reaches from the core all the way out into space

b)

is only at the North pole

c)

is only at the South pole

d)

None of the above

57.

Name 4 characteristics of magnets

4 lines
58.

lodestone, pyrrhotite, columbite and basalt are

a)

man - made magnets

b)

Natural magnets

c)

Temporary magnets

d)

Plastic Magnets

59.
An electromagnet's poles may be reversed by:
a)
decreasing the voltage of the coil
b)
increasing the number of coils
c)
changing the direction of current flow
d)
altering the material used to make the coils
60.

Like poles _____________each other, while unlike poles_______ each other.

(a)  

61.

(a)   magnets retain their properties only for a short period of time.

62.

All (a)   magnets are permanent magnets.

63.

Iron, nickel and cobalt are (a)   materials

64.

Opposite poles/ Unlike poles (a)   each other.

65.

Same poles/like pole (a)   each other.

66.

What is an alternate formula for Joule’s Law?

a)

V = IR

b)

W = VIT

c)

  Q = v2R\frac{v^2}{R}  t

d)

P = VI

67.

What is the formula for Electrical power?

a)

Q = I2I^2 Rt

b)

I = V/R

c)

P = VI

d)

None of these

68.

A dangerous condition when you make electrical contact with a conductor which may cause shock or injury.

a)

Electrical hazard

b)

Fuse

c)

Electric shock

d)

Circuit Breaker

69.

A wire that has a high potential. Is also called hot wire or phase wire

a)

Neutral Wire

b)

Live Wire

c)

Ground Wire

d)

Circuit Breaker

70.

When you draw more electricity than what a circuit can handle

a)

Overheating

b)

Electrical Power

c)

Circuit Overload

d)

Short Circuit

71.

When a live wire and the neutral wire come into direct contact, due to damage of insulation of live wire.

a)

Short Circuiting

b)

Overheating

c)

Circuit Overload

d)

None of these

72.

The magnitude of electrical work depends on:

a)

Current

b)

Time

c)

Voltage

d)

All of these

73.

An electric tester is used to measure:

a)

Hot wire

b)

Resistance

c)

Voltage

d)

Current

74.

Look at the plug. The top plug is connected to the:

a)

Ground Wire /Earth Wire

b)

Neutral Wire

c)

All of these

d)

Live wire/hot wire

75.

You use a 1500 Watt hair heater for 3 hours. How many kilowatt-hours of electricity did you use?

a)

4.5 Joules

b)

4.5 kWh

c)

4500 kWh

d)

3 kWh

76.

Write down the number and its matching letter.

4 lines
77.

Air cooling uses water as a heat conductor.

a)

True

b)

False

78.

Neutral wire provides an alternative path for the current to flow

a)

True

b)

False

79.

Electrical Power is the product of voltage and current

a)

True

b)

False

80.

We can use an electric tester to measure the amount of electricity we use in our houses

a)

True

b)

False

81.

What is air cooling? Name 2 types of air cooling.

4 lines
82.

Your oven has a power rating of 5000 watts.

a.    If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used?

b.    If your town charges 4 RMB per kWh, what is the cost to use the oven to bake the cookies?

4 lines
83.

The specification of a household electric heater is “250V, 1000W.

a.    What is the resistance of the internal heating wire when this kind of electric heater works normally?

b.     How much Joule heat is produced when working for 10 minutes at the rated voltage?

4 lines
84.

What are the common types of electric shock

4 lines
85.

List the common components of the home circuit

4 lines

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