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Cambridge International Examinations Cambridge Secondary 1 Checkpoint
1113/01
SCIENCE Paper 1
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 12 printed pages. IB19 10_1113_01/4RP © UCLES 2019
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Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
October 2019
Page 2 of 12
/ 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
1113/01
1(b)(i)
1(a)
Question
1113/01
Page 3 of 12
no nucleus = 1 mark to carry more oxygen / more space for haemoglobin = 1 mark
OR
large surface area (to volume ratio) / biconcave / thin membrane / permeable membrane = 1 mark to absorb oxygen quickly / to absorb oxygen easily / more oxygen diffuses / to allow oxygen to enter more easily = 1 mark
OR
flexible / rounded shape / small = 1 mark to pass through capillaries / to pass through narrow blood vessels = 1 mark
OR
contains haemoglobin = 1 mark to carry oxygen = 1 mark
any one from
because it is made up of several different tissues
organ
Answer
Marks
Further Information
October 2019
how the structure is related to function = 1 mark
2 structural feature = 1 mark
Accept contains more than one type of cell
2 Note if not organ = 0 for the question
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
2(c)
diffusion
Page 4 of 12
because particles move faster / hit sides of bottle harder / more collisions with bottle / particles have more energy
increases
2(b)
Answer
idea of (gas) particles colliding with the bottle
which can contract
(long) fibre
Answer
Marks
Marks
October 2019
Further Information
1
2 Note this marking point is independent of the first marking point
1 Accept particles hit the bottle / particles bounce off bottle
Further Information
how structure relates to function = 1 mark
2 structural feature = 1 mark
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
2(a)
Question
1(b)(ii)
Question
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4(b)
4(a)
Question
3
Question
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Page 5 of 12
has 8 legs / 4 pairs of legs / body divided into 2 main parts / lacks antennae
C (does the animal have) 1 pair of legs per segment? / ‘feelers’ on its ‘tail’ idea?
B (does the animal have) wings?
A (does the animal have) 6 legs? / 3 pairs of legs? / 3 body sections?
Answer
the same.
the same.
The amplitude of the sound stays
The volume of the sound stays
The frequency of the sound decreases.
The pitch of the sound decreases.
Answer
Marks
Marks
October 2019
Further Information
1
Note question requires a yes answer for the centipede
Accept are there stripes on the body?
Note question requires a yes answer for the bee
3 Note question requires a yes answer for the insects (ants and bees)
Further Information
4 each correct sentence = 1 mark
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
large (dorsal) fin / long (dorsal) fin
streamlined (body) / long and thin (body)
(long) muscular body
large teeth / sharp teeth
Page 6 of 12
any two from
6(b)(ii)
large powerful jaws
(black colour means) it can hunt without being seen / cannot be seen by prey
6(b)(i)
Answer
carbon sulfate
(very) large eyes / big eyes
any value from 3–6
carbon hydroxide
carbon dioxide carbon carbonate
C
Answer
Marks
Marks
Further Information
October 2019
Accept long and narrow / long and slim
Accept large mouth
2 Ignore reference to tail
1 Accept camouflaged / blends in with surroundings / difficult to be seen
1 Ignore has night vision
Further Information
1 Accept a range providing it is inclusive of range in mark scheme
1 more than one circle = 0 marks
1
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
6(a)
Question
5(b)(ii)
5(b)(i)
5(a)
Question
1113/01
As the speed increases by 16 km/h the thinking distance increases
7(b)
thinking distance
7(d)
more than doubles
stopping distance
more than doubles
braking distance
doubles
24 (m)
7(c)
Page 7 of 12
by 3m (each time) / equally / by the same amount
96 (m)
Answer
Marks
Further Information
one or two correct = 1 mark
2 three correct = 2 marks
1
2
1
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
7(a)
Question
1113/01
October 2019
8(c)
tube B (idea that) there is no air or oxygen present (in the water)
8(b)
Page 8 of 12
(idea that) destroys or damages object (made of iron or steel) / weakens objects (made of iron or steel) / rusting does not look nice / need to regularly replace object (made of iron or steel)
tube C (idea that) there is no water present
oxygen
Answer
Marks
Accept water has been removed / the tube is dry
Accept very little air or oxygen in the tube
Accept oil stops air or oxygen from entering / oil blocks oxygen
Further Information
October 2019
Accept becomes brittle / rust increases friction (in machines)
1 Note answer does not have to mention iron or steel but if a named metal is given it must be iron or steel
2
1
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
8(a)
Question
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9
Question
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turn the (cell) battery around
remove the switch
remove the iron nail
Page 9 of 12
change the iron nail to a wooden pencil
add more coils to the insulated wire
add another switch
add another cell (battery)
Answer
Marks
Further Information
October 2019
four or more answers = 0 marks
one correct answer and two incorrect answers = 0 marks
two correct answers and one incorrect answer = 1 mark
one correct answer and one incorrect answer = 1 mark
2 two correct answers = 2 marks
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
any two from
10(b)
anchor muscles
support
movement (of joints)
protection (of internal organs)
bone
10(a)
Question
1113/01
Answer
Page 10 of 12
Marks
Further Information
October 2019
2
Accept storage for minerals e.g. calcium or phosphate
1 Do not accept ligament / muscle / bone marrow
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
11(b)
11(a)
Question
1113/01
Page 11 of 12
Accept magnesium is more reactive than zinc / ora
magnesium is the fastest / zinc is slower than magnesium
comparison involving rate = 1 mark
comparison involving time = 1 mark
2 Note if yes = 0 marks for the question
variable measured = 1 mark
all correct in any order = 2 marks but two correct = 1 mark one correct = 0 marks
4 variable changed = 1 mark
Further Information
Note just quoting times is not sufficient
Marks
October 2019
zinc does not take the shortest time (to make 50 cm3 of gas) / magnesium takes the shortest time (to make 50 cm3 of gas)
no (no mark)
D / time to make 50 cm3 of gas
B and C and E
A / the metal used
Answer
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
12(b)
12(a)
Question
1113/01
Earth is spinning / Earth is rotating
stars
3. Sun
2. Neptune
1. Venus
Answer
Page 12 of 12
Marks
Further Information
2 Accept Earth is moving
one or two correct = 1 mark
2 three correct = 2 marks
Checkpoint Secondary 1 Science – Mark Scheme PUBLISHED
October 2019