Cambridge Lower Secondary Checkpoint
SCIENCE
1113/02
Paper 2
April 2022
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 a 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.
This document has 18 pages. Any blank pages are indicated.
IB22 05_1113_02/8RP
© UCLES 2022
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1113/02
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
April 2022
General guidelines on marking
Many descriptive answers can be expressed in a variety of ways. Professional judgement can be
used in these cases, providing it matches the marking points and further information in the mark
scheme.
Answers may have words spelt incorrectly. Credit is normally given for phonetically correct
answers, unless the word has a scientifically different meaning. For example, where the answer
should be antennae, credit will be given for antena but not for anthen (too close to anther).
Only the science is being assessed so answers do not need to be grammatically correct.
Significant figures will be indicated in the question or in the mark scheme.
Unless specified all marking points are independent.
Annotations and abbreviations
/ or
alternate responses for the same marking point
( ) brackets
the words or units in brackets do not need to be stated, for example, (recycles or
releases or provides) minerals = minerals scores the mark
Underline
exact word is required
Accept
an acceptable response
Do not accept
indicates an incorrect response that would contradict another otherwise correct
alternative
Ignore
indicates an irrelevant answer that is not creditworthy. Full marks can still be
achieved even with answers that are ignored.
Note
provides extra information when necessary
ecf
error carried forward; marks are awarded if an incorrect response has been
carried forward from earlier working, provided the subsequent working is correct
ora
or reverse argument; for example, as mass increases, volume increases could be
written as mass decreases, volume decreases
Page 2 of 18
1
Question
1113/02
cell drawing
Answer
Page 3 of 18
transports
oxygen
absorbs water
and minerals
detects changes
in the surroundings
pollinates the stigma
of a flower
joins with an egg
contacts to cause
movement
makes sugar using
photosynthesis
function
Further Information
April 2022
more than one line from cell drawing =
0 marks for that cell drawing
one correct = 1 mark
two or three correct = 2 marks
four correct = 3 marks
4 all five correct = 4 marks
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
(b)
2(a)
Question
1113/02
carbon dioxide
potassium
chloride
sodium
sulfate
calcium
nitrate
salt made
Answer
Page 4 of 18
Further Information
April 2022
1 Accept CO2, but name takes precedence
Do not accept potassium chlorine or
potassium chlorite
Do not accept sodium sulfide or sodium
sulfurate
Accept sodium sulphate
Do not accept calcium nitride
Note if name and formula given both must be
correct
Accept correct formulae Ca(NO3) 2, Na 2SO4,
KCl
3 full name of each correct salt = 1 mark
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
light travels from the Sun to our eyes
star
Moon reflects sunlight
(b)(ii)
(c)
the Earth spins on its axis
Answer
Page 5 of 18
Further Information
April 2022
Do not accept light reflects off the Sun or
Moon emits light
1 Accept Moon reflects Sun’s rays or light
from Sun bounces off it to the Earth or
reflects light from the Sun
Do not accept Moon or planet
Ignore galaxy or galaxies
1 Accept named stars, e.g. Sirius or Polaris or
Vega
Ignore reference to reflection
Note light travels from the Sun is not
sufficient
1 Accept light travels from Sun to the Earth
Accept any description of the Earth moving
1 Accept Earth moves or Earth rotates
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
(b)(i)
3(a)
Question
1113/02
(D)
(B)
4
F C
Answer
Page 6 of 18
A E
Further Information
April 2022
if no marks awarded give 1 mark for
A E (B) (D) F C
A and E = 1 mark
2 F and C correct = 1 mark
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
Question
1113/02
(b)(i)
5(a)
Question
1113/02
move slowly
(move quickly)
close (together) or
regular
(close together)
far apart or random
solid
liquid
gas
Page 7 of 18
vibrate
arrangement of particles
diffusion
movement of
particles
Answer
Further Information
1
April 2022
Accept particles in a gas are scattered or
particles are separated or further apart
Accept move faster than in a solid or move
slower than in a gas or particles flow over
each other
Ignore particles in a solid do not move or
fixed position
Accept particles in a solid are packed
together or tight together or tight
arrangement
one correct = 0 marks
two or three correct = 1 mark
2 all four correct = 2 marks
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
(b)(ii)
1113/02
Page 8 of 18
particles have spread out (to fill the space)
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
Do not accept idea of particles combining or
particle gaining energy or particles expanding
Note particles mixing is not sufficient
Accept (idea of) particles moving
Accept movement (of particles) from region
of high concentration to one of low
concentration
1 Accept random motion of the particles
April 2022
(idea that) there is a (downward) force
any number less than 4 (cm)
any two from
(a)(ii)
(b)(i)
(b)(ii)
moment decreases or is less
(idea that) distance is less
(idea that) a moment is force × distance
(idea that) the ruler bends more
Answer
Page 9 of 18
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
6(a)(i)
Question
1113/02
Accept if force is the same and the distance
between the force and the fulcrum
decreases the moment decreases = 2
marks
Accept moment = weight × distance
Accept turning force instead of moment
throughout
Ignore references to pressure
2 each correct answer = 1 mark
1 Do not accept 0
Do not accept there is pressure
Ignore it is pulled down
1 Accept gravity or the weight (of the object)
or it has (more) weight or a (larger) force
1 Accept the distance increases
Further Information
April 2022
gaseous exchange
any one from
(b)(i)
(b)(ii)
Page 10 of 18
good blood supply or (surrounded) by capillaries
thin or permeable or elastic or moist
large surface area
breathing or moves air in and out of the lungs
B
Answer
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
(a)(ii)
7(a)(i)
Question
1113/02
1
Accept have enough surface area
1 Accept take up oxygen or get rid of carbon
dioxide or provide oxygen to the blood or
exchange of carbon dioxide and oxygen
Accept separates thorax from abdomen
Accept lungs to expand or lungs to contract
Accept ventilation or inhalation or
exhalation
Accept to bring air or oxygen into the lungs
1 Accept to inhale air or to exhale air
1
Further Information
April 2022
(b)
8(a)
Question
1113/02
H
(one) proton
(nucleus containing)
Answer
Page 11 of 18
electron
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
Do not accept h
1 Ignore H2
Do not accept neutrons in the nucleus
Accept protons
Accept electrons
2 each correct answer = 1 mark
Further Information
April 2022
rule(r) or callipers
any one from
(b)
(c)
Accept in case there is an anomalous result
or to make sure the outcome is correct
Accept to compare results or see if results
are the same
Accept to make it more reliable
to check for error
1
1 Ignore metre rule(r) or measuring tape
Do not accept for accuracy
Accept so we can compare
Ignore accuracy or fair
Page 12 of 18
Further Information
1 Accept fair test
Marks
April 2022
to enable average to be taken
to look for consistency in tests
(length is a) control variable
Answer
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
9(a)
Question
1113/02
(b)
10(a)
Question
1113/02
Further Information
cheap to use
Page 13 of 18
no pollution or no greenhouse gases or no harmful gases
Accept ora for fossil fuels
Accept no acid rain pollution or does not
harm environment or cleaner source of
energy or no carbon emissions
Accept named non-renewable fuel is running
out
Accept reduce the use of fossil fuels or
conserves fossil fuels or conserves nonrenewable energy sources
renewable
running out of non-renewable fuels
Accept will not run out of wind
2 each correct answer = 1 mark
Note it depends on the weather is not
sufficient
Accept it is not a reliable energy source
Accept need placing in windy areas
2 each correct answer = 1 mark
Marks
April 2022
energy needs are increasing
any two from
(idea that) difficult to connect to the (electricity) grid
kill birds
spoil view
noisy
(often) in remote places
(idea that) not always windy or energy generation not constant
any two from
Answer
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
11
Question
1113/02
rusting
respiration
oxidation
neutralisation
Page 14 of 18
exothermic
endothermic
displacement
Answer
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
Further Information
more than three circled = 0 marks
three circled and one correct = 0 marks
2 three circled and two correct = 1 mark
Marks
April 2022
13
Question
12
Question
1113/02
Aeshna
Argiope
Calliphora
Formica
Scorpio
name
Answer
Page 15 of 18
letter
Y
W
V
X
Z
(idea of) recycling nutrients or minerals (may give an example,
e.g. in N cycle)
(idea of) something that lives on dead or decaying material or
breaks down dead tissue or (organism that) causes something to
rot or decay or breaks down organic matter
Answer
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
Guidance
Further Information
one correct = 0 marks
two, three or four correct = 1 mark
2 all five correct = 2 marks
Marks
Note mark answers wherever they appear
Note ‘gets rid of dead matter’ is not sufficient
Accept recycling carbon compounds or
making manure or making compost or
increases soil fertility
importance = 1 mark
Accept idea of using waste products as food
Ignore the term decompose in their answer
and use an alternative term in their
description
2 definition = 1 mark
Marks
April 2022
(b)(ii)
(b)(i)
15(a)
Question
(b)
14(a)
B
Answer
C
francium
K
N
Na
potassium hydroxide or hydrogen
same pressure
A
P
Po
E
Page 16 of 18
D
Answer
Question
Further Information
April 2022
Further Information
1 Accept Fr, but if symbol and name given
they must both be correct
1 more than one answer circled = 0 marks
1 Accept KOH or H2, but name takes
precedence
Marks
1
1 more than one answer circled = 0 marks
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
1113/02
16
0.0
–11.0
32.5
B
C
temperature
in °C
A
thermometer
Page 17 of 18
Answer
Question
2
Marks
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
1113/02
Accept 0 and –11
one correct = 0 marks
two correct = 1 mark
all three correct = 2 marks
Further Information
April 2022
1113/02
Page 18 of 18
BLANK PAGE
Cambridge Lower Secondary – Mark Scheme
PUBLISHED
April 2022
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