Cambridge Assessment International Education
Cambridge Secondary 1 Checkpoint
1113/02
SCIENCE
Paper 2
October 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.
This document consists of 14 printed pages.
IB19 10_1113_02/5RP
© UCLES 2019
[Turn over
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
October 2019
Page 2 of 14
/ OR alternate responses for the same marking point
( ) the words or units in brackets do not need to be stated
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, however, full marks can still be achieved even with the answers that are ignored
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
Note provides extra information when necessary
Annotations and abbreviations
1113/02
2(b)
2(a)
Question
1113/02
Animals did not live in areas where
metamorphic rocks were formed.
Metamorphic rocks are formed when molten
rock cools.
Metamorphic rocks were formed before there
was life on Earth.
Metamorphic rocks are formed under high
temperatures and pressures.
A
Answer

Page 3 of 14
Marks
October 2019
Further Information
1 more than one box ticked = 0 mark
1 Accept top layer
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
3(b)
3(a)
Question
1113/02
9(.0) (g/cm3)
450
50
density = mass
volume
sodium
magnesium
iron
copper
aluminium
Answer
Page 4 of 14
Marks
October 2019
Further Information
1 more than one answer = 0 marks
3 correct answer on own = 3 marks
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
5
Question
4
Question
1113/02
Page 5 of 14
in both males and females
growth of body hair / enlargement of sex organs / teenage spots /
growth spurt
only in females
menstruation / ovulation / develop breasts / hips widen
only in males
voice breaks / produces sperm / grows beard / facial hair
Answer
Do not accept any marking point from the both
males and females list
Accept has period / eggs released / menstrual cycle
/ growth of ovaries
Do not accept any marking point from the both
males and females list
3 Accept voice gets deeper / voice gets lower / bigger
Adam’s apple / shoulder broaden / starts ejaculation
/ scrotum enlarge / testes enlarge / penis enlarge
Further Information
Accept green filter absorbs red light
green filter only lets green light through / green filter absorbs all light
except green
3 Accept no colour / black / nothing
Further Information
Accept red filter absorbs blue and green / red filter
transmits red light
Marks
Marks
October 2019
red filter only lets red light through / red filter absorbs all light except
red
and for one mark each:
(idea of) no light / darkness
Answer
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
6(b)
6(a)
Question
1113/02
36.9
36.8
36.7
36.6
temperature
o
in C
36.8
I
IIII
tally
(0)
(0)
1
4
number of
students at
this
temperature
Answer
Page 6 of 14
Marks
Further Information
October 2019
Accept ecf for the number of students from the tally
column
Accept ecf from (a) for the tally column
2 each correct column = 1 mark
1 Accept any value between 36.75 to 36.85 inclusive
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
6(c)
Question
1113/02
Page 7 of 14
correct bars that occupies roughly half or more of the grid / correct
frequency graph shown as a smooth curve that occupies at least half
or more of the grid = 1 mark
one mark for bars or graph
OR
x-axis and y-axis labels correct = 1 mark
x-axis and y-axis have a linear scale = 1 mark
EITHER
x axis and linear scale correctly labelled – temperature in C = 1 mark
y axis and linear scale correctly labelled – number of students, #
students or tally = 1 mark
Two marks maximum for the axes and scales
Answer
Marks
Further Information
October 2019
0
0
1
4
7
5
2
1
36.6
36.7
36.8
36.9
37.0
37.1
37.2
37.3
Do not accept a graph that is dot to dot
Note numbers must be in the middle of the bar
Accept ecf from tally chart
Accept a vertical line as a very narrow bar
Accept one error in the plotting of points or bars
Ignore any numbers at the origin in term of the linear
scale
Accept axes reversed
number of students
temperature in C
o
3 Note the correct values for the graph are shown in
the table
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
protons
7(a)(ii)
Answer
radon
increases
7(b)(i)
7(b)(ii)
Page 8 of 14
Marks
Further Information
October 2019
1
1
Do not accept circles on the inner circle but they
can just touch the inner circle
Accept any colour other than black and any size – if
black the circle must be either labelled or clearly
different to the original black circles on the question
paper
2 Accept electrons if answer to 7(a)(i) is incorrect
1
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
two circles drawn inside the inner circle
electrons
7(a)(i)
Question
1113/02
Accept angle of reflection is the same for each ray
with a smooth surface / ora for rough surface
Accept reflections are scattered with rough surface /
reflections irregular for rough surface / reflections are
random for rough surface / ora for smooth surface
1 Accept reverse argument
(idea that) for the smooth surface all the rays are parallel / rays are
lined up / the rays that hit and leave the surface are all in the same
direction
8(b)
Page 9 of 14
October 2019
Further Information
1 Accept incident
Marks
The angle of reflection equals the angle of incidence.
Answer
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
8(a)
Question
1113/02
9(b)
9(a)(ii)
9(a)(i)
Question
1113/02
(needed before) fertilisation can take place
(idea of) male gamete has to meet female gamete
any one from
(idea of) growing a (pollen) tube
(idea of) spikes increase surface area
Page 10 of 14
October 2019
Further Information
Accept so gametes can fuse / so pollen can meet
ovule / so it can form a zygote / so pollen can enter
the ovary / so male sex cell can meet the female sex
cell
2 Accept (pollen) germination
1
any one from
(idea of) spikes hook on to insect’s body
1
Marks
anther
Answer
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
11
Question
10(b)
10(a)
Question
1113/02
This process is called convection.
dense.
At B cool air sinks because it is more
top soil
dense.
Answer
sediments
sandy soil
C
humus
loam soil
B
At A warm air rises because it is less
deposits
clay soil
A
Answer
Page 11 of 14
Marks
Marks
Ignore heavy
Further Information
If two lines come from a letter then the answer for
that letter is incorrect.
one or two correct = 1 mark
3 Ignore light
1
October 2019
Further Information
2 all correct = 2 marks
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
13
Question
12
Question
1113/02
trapped air is a good radiator
Page 12 of 14
trapped air is a good insulator
trapped air is a good convector
trapped air is a good conductor
Answer
hydrochloric (acid)
sulfuric (acid)
nitric (acid)
(acid)
Answer
Marks
Marks
October 2019
Further Information
1 more than one answer circled = 0 marks
Further Information
Accept correct formulae, HNO3, H2SO4, HCl
Accept hydrogen nitrate / hydrogen sulfate /
hydrogen chloride
one or two correct = 1 mark
2 all correct = 2 marks
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
15(b)
15(a)
Question
14
Question
1113/02
quadrat
frame
pitfall
trap
net
Answer
sampling the plants
growing in an area of
grassland
sampling aquatic
insects living in
a small stream
collecting ground
dwelling animals
which are active and
hunt at night
Activity
Page 13 of 14
This component measures voltage across the lamp.
The component shown by V is a voltmeter.
The circuit diagram shows a parallel circuit.
This component measures current.
The component shown by A is (an) ammeter.
The circuit diagram shows a series circuit.
cup
Apparatus
Answer
October 2019
Further Information
Accept volts / potential difference
one or two correct = 1 mark
2 three correct = 2 marks
Accept amps / amperes
one or two correct = 1 mark
2 three correct = 2 marks
Further Information
one or two correct = 1 mark
2 three correct = 2 marks
Marks
Marks
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
16(c)
(copper is) more reactive than silver / silver is lower in the reactivity series
(than copper)
16(b)
copper nitrate and silver
Page 14 of 14
(copper is) less reactive than lead / lead is higher in the reactivity series (than
copper)
potassium / sodium / calcium
Answer
Further Information
October 2019
either order
1 both needed for mark
2 Accept copper is between lead and
silver in reactivity series = 2 marks
1
Marks
Checkpoint Secondary 1 Science – Mark Scheme
PUBLISHED
16(a)
Question
1113/02