magnets - alston publishing · pdf filea magnet can attract or repel another magnet from a ......
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Name: Class: Date:
Magnets
Consolidation Worksheet 1What Is a Magnet?Fill in the blanks below.
Magnets attract objects that are made of materials.
Objects that are made of and will be
attracted by a magnet.
A natural magnet is also called a .
Magnets are made of materials.
Circle the objects below that can be attracted by a magnet. Cross out the metal objects below that cannot be attracted by a magnet.
Handkerchief
Wooden doll
Steel paper clip
Steel ruler
Gold ring
Aluminium can
Eraser
Plastic cup
Iron nail
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 341
Name: Class: Date:
Magnets
Consolidation Worksheet 2
1. A magnet can attract all metals.
2. A magnet cannot attract all non-metals.
3. A magnet will always point in an East-West direction.
4.The North pole of a magnet will repel the South pole of another magnet.
5. A magnet is strongest at its poles.
6.A magnet can attract or repel another magnet from a distance.
7.A magnet cannot attract an object made of magnetic material from a distance.
8. Magnetism can pass through non-magnetic materials.
Tick (ü) the boxes next to the statements that are TRUE.
What Are the Properties of Magnets?
342 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
Name: Class: Date:
Magnets
Consolidation Worksheet 3How Are Magnets Made?Study the flowchart below. Fill in the blanks with methods of making magnets.
Methods of making an iron nail into a magnet:
Start
Does the iron nail need to come
into contact with another magnet?
Does the iron nail keep its magnetism even when not in contact
with a magnet?
No No
Yes YesZ
X Y
X: Y: Z:
Why is it better to use electromagnets than ordinary magnets when you need to lift and drop objects made of magnetic materials?
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 343
Name: Class: Date:
Magnets
Consolidation Worksheet 4What Are the Uses of Magnets?Match each picture to the correct use of the magnets.
The magnet helps to hold notes to surfaces that are made of magnetic materials.
The magnet always points to Earth’s North Pole. It helps us to find our direction.
The magnet attracts only rubbish that is made of magnetic materials. These magnetic materials are separated from the rubbish and recycled.
The magnet allows a Maglev train to ‘float’. This allows Maglev trains to move much faster than normal trains.
344 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
Name: Class: Date:
Magnets
Consolidation Worksheet 4What Are the Uses of Magnets?Match each picture to the correct use of the magnets.
The magnet helps to hold notes to surfaces that are made of magnetic materials.
The magnet always points to Earth’s North Pole. It helps us to find our direction.
The magnet attracts only rubbish that is made of magnetic materials. These magnetic materials are separated from the rubbish and recycled.
The magnet allows a Maglev train to ‘float’. This allows Maglev trains to move much faster than normal trains.
Name: Class: Date:
Fun and Games
Magnets
Solve the Puzzle!
Unscramble each of the words below and fill them in the coloured boxes. When you are done, fill in the words according to their colours in the blanks below to find out a property of magnets. The first letter of each word has been given.
a.
b.
c.
d.
e.
Property of magnets:
P
R
L
A
U
SOLEP
KILE
PREEL
TARCTAT
LUKINE
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 345
Name: Class: Date:
Exam Practice
Magnets
Process skills: Observing, Analysing, Inferring
Tom had four iron bars. He placed them next to one another to test if any of them were magnets. His observations are shown below.
Fill in the table below to indicate which bars are magnets and which are non-magnets.
attract
Bar A Bar B
Bar B Bar C
Bar C Bar D
Bar A Bar D
attract
repel
neither attractnor repel
Magnets Non-magnets Hint:Can two non-magnets repel each other? Can a magnet
and a non-magnet repel each other?
346 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
Ans
wer
s to
Add
ition
al T
each
er’s
Res
ourc
esA
nsw
ers
to A
dditi
onal
Tea
cher
’s R
esou
rces
Nam
e:
C
lass
:
Dat
e:
Mag
net
s
Co
nso
lid
atio
n W
ork
shee
t 2
1.A
mag
net c
an a
ttra
ct a
ll m
etal
s.
2.A
mag
net c
anno
t att
ract
all
non-
met
als.
3.A
mag
net w
ill al
way
s po
int i
n an
Eas
t-Wes
t dire
ctio
n.
4.Th
e N
orth
pol
e of
a m
agne
t will
repe
l the
Sou
th p
ole
of
anot
her
mag
net.
5.A
mag
net i
s st
rong
est a
t its
pol
es.
6.A
mag
net c
an a
ttra
ct o
r re
pel a
noth
er m
agne
t fro
m a
di
stan
ce.
7.A
mag
net c
anno
t att
ract
an
obje
ct m
ade
of m
agne
tic
mat
eria
l fro
m a
dist
ance
.
8.M
agne
tism
can
pas
s th
roug
h no
n-m
agne
tic m
ater
ials.
Tick
(ü
) th
e bo
xes
next
to th
e st
atem
ents
that
are
TRU
E.
Wha
t A
re t
he
Pro
per
ties
of
Ma
gnet
s?
✓ ✓ ✓ ✓
Nam
e:
C
lass
:
Dat
e:
Mag
net
s
Co
nso
lid
atio
n W
ork
shee
t 1W
ha
t Is
a M
ag
net
?Fil
l in
the
blan
ks b
elow
.
Mag
nets
att
ract
obj
ects
that
are
mad
e of
m
ater
ials.
Obj
ects
that
are
mad
e of
a
nd
will
be
attr
acte
d by
a m
agne
t.
A n
atur
al m
agne
t is
also
cal
led
a .
Mag
nets
are
mad
e of
m
ater
ials.
Circ
le th
e ob
ject
s be
low
that
can
be
attr
acte
d by
a m
agne
t. C
ross
out
the
met
al o
bjec
ts b
elow
that
can
not b
e at
trac
ted
by
a m
agne
t.
Hand
kerc
hief
Woo
den
doll
Stee
l pap
er c
lip
Stee
l rul
er
Gol
d rin
g
Alu
min
ium
can
Eras
er
Plas
tic c
up
Iron
nai
l
mag
netic
mag
netic
stee
liro
n lode
ston
e
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 347
Ma
gn
ets
Ans
wer
s to
Add
ition
al T
each
er’s
Res
ourc
esA
nsw
ers
to A
dditi
onal
Tea
cher
’s R
esou
rces
Nam
e:
C
lass
:
Dat
e:
Mag
net
s
Co
nso
lid
atio
n W
ork
shee
t 4W
ha
t A
re t
he
Use
s of
Ma
gnet
s?M
atch
eac
h pi
ctur
e to
the
corr
ect u
se o
f the
mag
nets
.
The
mag
net h
elps
to h
old
note
s to
sur
face
s th
at
are
mad
e of
mag
netic
m
ater
ials.
The
mag
net a
lway
s po
ints
to
Eart
h’s
Nor
th P
ole.
It h
elps
us
to fi
nd o
ur d
irect
ion.
The
mag
net a
ttrac
ts o
nly
rubb
ish th
at is
mad
e of
m
agne
tic m
ater
ials.
The
se
mag
netic
mat
eria
ls ar
e se
para
ted
from
the
rubb
ish
and
recy
cled
.
The
mag
net a
llow
s a
Mag
lev
trai
n to
‘flo
at’.
This
allo
ws
Mag
lev
trai
ns to
m
ove
muc
h fa
ster
than
no
rmal
trai
ns.
Nam
e:
C
lass
:
Dat
e:
Mag
net
s
Co
nso
lid
atio
n W
ork
shee
t 3H
ow
Are
Ma
gnet
s M
ad
e?St
udy
the
flow
char
t bel
ow. F
ill in
the
blan
ks w
ith m
etho
ds o
f mak
ing
mag
nets
.
Met
hods
of m
akin
g an
iron
nai
l int
o a
mag
net:
Star
t
Doe
s th
e iro
n na
il ne
ed to
com
e in
to c
onta
ct w
ith
anot
her
mag
net?
Doe
s th
e iro
n na
il ke
ep
its m
agne
tism
eve
n w
hen
not i
n co
ntac
t w
ith a
mag
net?
No
No
Yes
Yes
Z
XY
X:
Y:
Z:
Why
is it
bet
ter
to u
se e
lect
rom
agne
ts th
an o
rdin
ary
mag
nets
whe
n yo
u ne
ed to
lift
and
dro
p ob
ject
s m
ade
of m
agne
tic m
ater
ials?
The
mag
netis
m o
f ele
ctro
mag
nets
can
be
switc
hed
on a
nd o
ff m
uch
mor
e ea
sily
than
ord
inar
y m
agne
ts. T
hus,
elec
trom
agne
ts c
an a
ttrac
t
and
drop
obj
ects
qui
ckly
.
Elec
tric
al m
etho
d‘T
ouch
’ met
hod
‘Str
oke’
met
hod
348 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
Ch
ap
ter 6
Ans
wer
s to
Add
ition
al T
each
er’s
Res
ourc
esA
nsw
ers
to A
dditi
onal
Tea
cher
’s R
esou
rces
Nam
e:
C
lass
:
Dat
e:
Ex
am P
ract
ice
Mag
net
s
Pro
cess
sk
ills
: Obs
ervi
ng, A
naly
sing,
Inf
errin
g
Tom
had
four
iron
bar
s. He
pla
ced
them
nex
t to
one
anot
her
to te
st if
an
y of
them
wer
e m
agne
ts. H
is ob
serv
atio
ns a
re s
how
n be
low
.
Fill i
n th
e ta
ble
belo
w to
indi
cate
whi
ch b
ars
are
mag
nets
and
whi
ch a
re
non-
mag
nets
.
attr
act
Bar
ABa
r B
Bar
BBa
r C
Bar
CBa
r D
Bar
ABa
r D
attr
act
repe
l
ne
ither
att
ract
nor
repe
l
Mag
nets
Non
-mag
nets
Hin
t:C
an t
wo
non-
mag
nets
rep
el
each
oth
er?
Can
a m
agne
t an
d a
non-
mag
net
repe
l ea
ch o
ther
?
Bar
ABa
r D
Bar
BBa
r C
Nam
e:
C
lass
:
Dat
e:
Fu
n a
nd
G
ames
Mag
net
s
So
lve
the
Pu
zzle
!
Unsc
ram
ble
each
of t
he w
ords
bel
ow a
nd fi
ll th
em in
the
colo
ured
bo
xes.
Whe
n yo
u ar
e do
ne, f
ill in
the
wor
ds a
ccor
ding
to th
eir
colo
urs
in th
e bl
anks
bel
ow to
find
out
a p
rope
rty
of m
agne
ts. T
he fi
rst l
ette
r of
ea
ch w
ord
has
been
giv
en.
a. b. c. d. e. Prop
erty
of m
agne
ts:
P RL A U
SOLE
P
KILE
PREE
L
TARC
TAT
LUKI
NE
OL
ES
EP
EL
IK
E
TT
RA
CT
NL
IK
E
LIKE
UNLI
KE
POLE
S
POLE
S
REPE
L
ATT
RAC
T
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 349
Ma
gn
ets
Glossary
GlossaryChapter 6: Magnets
Attract When opposite poles of magnets are pulled towards each other
Electrical method The use of electric current running through a wire coiled round a magnetic material to make it a magnet
Electromagnet Temporary magnet made using the electrical method
Like poles Same poles of magnets
Lodestone A mineral which is naturally magnetic
Magnetism Force of attraction of a magnet
North pole One end of a magnet which, when suspended freely, points North
Repel When similar poles of magnets push each other away
‘Stroke’ method Running a magnet along a magnetic material in a circular motion to make the magnetic material a temporary magnet
South pole One end of a magnet which, when suspended freely, points South
‘Touch’ method Turning a magnetic material into a temporary magnet by having a magnet come into contact with it
Unlike poles Different poles of magnets
350 © 2012 Alston Publishing House Pte Ltd
Ch
ap
ter 6