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IB19 05_0846_02/3RP © UCLES 2019 [Turn over
Cambridge Assessment International Education Cambridge Primary Checkpoint
SCIENCE 0846/02
Paper 2 April 2019
MARK SCHEME
Maximum Mark: 50
Published This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Markers were instructed to award marks. It does not indicate the details of the discussions that took place at an Markers’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the End of Series Report. Cambridge will not enter into discussions about these mark schemes.
0846
/02
Che
ckpo
int S
econ
dary
1 S
cien
ce –
Mar
k S
chem
e
Apr
il 20
19
P
UB
LIS
HE
D
© U
CLE
S 2
019
Pag
e 2
of 1
2
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
1(a)
gro
up
1
gro
up
2
(A)
(D)
(F)
B
E
C
1al
l cor
rect
= 1
mar
k B
and
C c
an b
e in
eith
er o
rder
in g
roup
2
1(b)
win
gs
1A
ccep
t ca
n fly
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
2
inte
nsity
opa
que
ref
lect
ion
s
hado
w t
rans
pare
nt
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
0846
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Che
ckpo
int S
econ
dary
1 S
cien
ce –
Mar
k S
chem
e
Apr
il 20
19
P
UB
LIS
HE
D
© U
CLE
S 2
019
Pag
e 3
of 1
2
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
3
caus
e lo
ss o
f spe
cies
plan
t for
ests
prot
ect
habi
tats
redu
ce w
aste
stop
peo
ple
killi
ng a
nim
als
1m
ore
than
one
ans
wer
tick
ed =
0 m
arks
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
4(a)
fil
ter
pape
r1
4(b)
ev
apor
atin
g ba
sin
/ eva
pora
ting
dish
1A
ccep
t ‘e
vapo
ratio
n’ fo
r ‘e
vapo
ratin
g’
4(c)
an
y th
ree
fro
m
sand
doe
s no
t go
thr
ough
the
filt
er p
aper
/ s
and
is
inso
lubl
e / s
and
does
not
dis
solv
e in
wat
er
salt
solu
tion
goes
thr
ough
the
filt
er p
aper
or
funn
el /
sal
t sol
utio
n co
llect
ed (
in t
he e
vapo
ratin
g ba
sin/
dish
) / s
alt
is s
olub
le
(hea
t to)
eva
pora
te th
e w
ater
sa
lt is
left
beh
ind
/ sa
lt cr
ysta
ls a
re fo
rmed
3 A
ccep
t sa
nd is
the
resi
due
/ san
d st
ays
on th
e pa
per
Acc
ept
salt
solu
tion
is t
he f
iltra
te
Acc
ept
‘sal
t wat
er’ f
or ‘s
alt s
olut
ion’
0846
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pril
2019
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BL
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Pag
e 4
of 1
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esti
on
A
nsw
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ks
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rth
er In
form
atio
n
5(a)
1
12
24
48
3
65
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
5(b)
dir
ecti
on
the
Ear
th s
pins
or
rota
tes
or t
urns
or
mov
es
1
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
6
any
two
fro
m
insu
lato
r / k
eeps
the
dri
nk h
ot
non-
toxi
c / n
on-p
oiso
nous
lo
w d
ensi
ty / m
akes
a li
ght
cup
/ lig
htw
eigh
t ca
n be
mol
ded
into
sha
pe /
mal
leab
le
inso
lubl
e / d
oes
no
t di
ssol
ve
wat
erpr
oof /
doe
s n
ot
leak
la
sts
for
a lo
ng t
ime
/ du
rabl
e
high
mel
ting
poin
t / d
oes
no
t m
elt e
asily
do
es n
ot
reac
t w
ith t
he d
rink
re
used
/ re
cycl
ed
chea
p to
mak
e
2
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ckpo
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Pag
e 5
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Qu
esti
on
A
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ks
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rth
er In
form
atio
n
7(a)
in t
he
abd
om
en
in
the
che
st
in
the
hea
d
in th
e le
gs
in
the
stom
ach
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
7(b)
I p
redi
ct th
at a
nim
al C
/ 4.8
is th
e sm
alle
st.
I pre
dict
this
bec
ause
it h
as t
he
sho
rtes
t in
test
ine
/ th
e in
test
ine
is o
nly
4.8
(m).
1bo
th a
nsw
ers
corr
ect =
1 m
ark
An
swer
mu
st b
e co
mp
arat
ive
Acc
ept
corr
ect
com
paris
ons
e.g.
it h
as t
he s
mal
lest
in
test
ine
/ sm
all c
ompa
red
to th
e ot
hers
7(c)
1
23
45
67
89
10 cm
0 5012
mm
102030405060708090100
cm3
60 m
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
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2019
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ED
Pag
e 6
of 1
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Qu
esti
on
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er
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ks
Fu
rth
er In
form
atio
n
8(a)
ther
mom
ete
r 1
Acc
ept
tem
pera
ture
pro
be
8(b)
the
liqui
d ca
n bu
rn /
catc
h fir
e 1
8(c)
turn
s in
to a
gas
1
Acc
ept
turn
s in
to a
vap
our
/ it e
vapo
rate
s D
o n
ot
acce
pt
turn
s in
to w
ater
vap
our
/ con
dens
es
/ tur
ns in
to s
team
8(d)
C b
ecau
se it
has
a b
oilin
g po
int
of 1
00(
C)
1no
mar
ks fo
r C
on
its o
wn
8(e)
B b
ecau
se it
leav
es b
ehin
d a
solid
1
no m
arks
for
B o
n its
ow
n
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
9(a)
win
d (d
ispe
rsal
) 1
9(b)
an
y tw
o f
rom
(s
ame)
num
ber
of s
eeds
am
ount
she
blo
ws
/ str
engt
h of
blo
w /
idea
that
Li
ly d
oes
it bo
th ti
mes
le
ngth
of t
ube
/ typ
e of
tube
/ s
ize
of fu
nnel
/
sam
e ap
para
tus
plac
e w
here
she
doe
s th
e in
vest
igat
ion
all t
he s
eeds
sta
rt in
the
fun
nel
2ea
ch c
orre
ct a
nsw
er =
1 m
ark
Acc
ept
(sam
e) fu
nnel
/ (s
ame)
tube
/ di
rect
ion
of
funn
el
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ED
Pag
e 7
of 1
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esti
on
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er
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ks
Fu
rth
er In
form
atio
n
10(a
)
kilo
gram
fo
rce
kilo
met
re
mas
s
lit
re
wei
ght
new
ton
2al
l th
ree
corr
ect =
2 m
arks
tw
o c
orre
ct =
1 m
ark
on
e co
rrec
t = 0
mar
ks
10(b
)
fo
rcem
eter
1
Acc
ept
new
ton
met
er /
sprin
g ba
lanc
e
10(c
)
(d
irect
ion
of)
fric
tion
/ fric
tiona
l for
ce /
air
resi
stan
ce
1
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
11
fert
ilisa
tion
A
germ
inat
ion
B
gr
owth
po
llina
tion
C
seed
dis
pers
al
2al
l th
ree
corr
ect =
2 m
arks
tw
o c
orre
ct =
1 m
ark
on
e co
rrec
t = 0
mar
ks
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ckpo
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k S
chem
e A
pril
2019
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BL
ISH
ED
Pag
e 8
of 1
2
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
12(a
)
a fo
rce
of a
ttrac
tion
a fo
rce
of re
puls
ion
a ne
gativ
e fo
rce
a po
sitit
ve fo
rce
ther
e is
no
forc
e
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
12(b
)
(idea
that
he)
turn
s th
e m
agne
t aro
und
/ hol
d th
e m
agne
t at t
he o
ther
end
of t
he to
y ca
r 1
Acc
ept
use
the
N p
ole
of th
e m
agne
t
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
13
char
t
key
ta
ble
g
raph
r
esul
ts
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
14(a
)
1199
12
01
1211
12
19
1910
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
14(b
)
A
C
D
E
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
14(c
)
(a
ir pa
rtic
les)
vib
rate
1
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BL
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ED
Pag
e 9
of 1
2
Q
ues
tio
n
An
swer
M
arks
F
urt
her
Info
rmat
ion
15(a
)
pu
mp
bloo
d (a
roun
d th
e bo
dy)
1
15(b
)
bo
ne(s
) 1
15(c
)
lu
ng(s
) 1
Qu
esti
on
A
nsw
er
Mar
ks
Fu
rth
er In
form
atio
n
16
the
lam
p is
on
the
wro
ng s
ide
of t
he s
witc
h
the
switc
h is
ope
n
ther
e is
no
cell
th
e ci
rcui
t is
no
t co
mpl
ete
1m
ore
than
one
ans
wer
tick
ed =
0 m
arks
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ckpo
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BL
ISH
ED
Pag
e 10
of 1
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Qu
esti
on
A
nsw
er
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ks
Fu
rth
er In
form
atio
n
17(a
)
As
the
tem
pera
ture
incr
ease
s th
e so
lubi
lity
of
salt
incr
ease
s.
1A
ccep
t re
vers
e ar
gum
ent e
.g. A
s th
e te
mpe
ratu
re
decr
ease
s th
e so
lubi
lity
of s
alt
decr
ease
s.
Acc
ept
alte
rnat
ive
wor
ds fo
r in
crea
ses
e.g.
is m
ore
17(b
)
As
the
tem
pera
ture
incr
ease
s th
e so
lubi
lity
of
oxyg
en d
ecre
ases
.
1A
ccep
t re
vers
e ar
gum
ent e
.g. A
s th
e te
mpe
ratu
re
decr
ease
s th
e so
lubi
lity
of o
xyge
n in
crea
ses.
A
ccep
t al
tern
ativ
e w
ords
for
incr
ease
s e.
g. r
ises
A
ccep
t al
tern
ativ
e w
ords
for
decr
ease
s e.
g. is
less
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Pag
e 11
of 1
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Qu
esti
on
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ks
Fu
rth
er In
form
atio
n
18(a
)
so
und
(leve
l) m
eter
/ de
cibe
l met
er
1
18(b
)
to
mak
e su
re t
he r
esul
ts a
re c
orre
ct /
to
chec
k th
e re
sults
/ t
o m
ake
the
resu
lts r
elia
ble
1
Acc
ept
the
wor
ds ‘m
easu
rem
ent’
and
‘ans
wer
’ for
‘re
sult’
e.g
.to m
ake
sure
the
mea
sure
men
ts a
re
corr
ect
Do
no
t ac
cep
t to
mak
e it
a fa
ir te
st /
to m
ake
the
resu
lts a
ccur
ate
18(c
)
an
y tw
o f
rom
al
l the
rea
ding
s ar
e in
the
60s
/ a
ll th
e re
adin
gs
are
in 6
0-70
ran
ge
68 is
the
hig
hest
or
loud
est
/ 61
is t
he lo
wes
t or
qui
etis
t or
sof
test
68
is d
iffer
ent t
o th
e ot
hers
/ 68
may
be
wro
ng
the
mea
n is
62.
8
2 A
ccep
t m
ost a
re 6
1 or
62
/ tw
o of
the
resu
lts a
re 6
2 / t
wo
of th
e re
sults
are
61
/ tw
o of
the
num
bers
are
re
peat
ed /
the
rang
e is
7
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Pag
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esti
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rth
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form
atio
n
19(a
)
6Pf1
Kth
e m
ass
is 0
.45
cm2
th
e m
ass
is 0
.45
kg
th
e m
ass
is 0
.45
m
th
e m
ass
is 4
.5 N
the
mas
s is
4.5
s
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
19(b
)
6Pf1
K
the
wei
gh
t is
0.4
5 cm
2
the
wei
gh
t is
0.4
5 kg
the
wei
gh
t is
0.4
5 m
the
wei
gh
t is
4.5
N
th
e w
eig
ht
is 4
.5 s
1m
ore
than
one
ans
wer
circ
led
= 0
mar
ks
Qu
esti
on
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Mar
ks
Fu
rth
er In
form
atio
n
20
solu
te
a
mix
ture
of
a di
ssol
ved
solid
and
a li
quid
solu
tion
the
liqui
d th
at d
isso
lves
a
solid
solv
ent
th
e so
lid t
hat d
isso
lves
in
a li
quid
.
2al
l th
ree
corr
ect =
2 m
arks
tw
o c
orre
ct =
1 m
ark
on
e co
rrec
t = 0
mar
ks