Science
Stage 7
Paper 1
Cambridge Lower Secondary Progression Test
Mark Scheme
3144_01_MS_3RP
© UCLES 2023
2023
3144/01
Science Stage 7 Paper 1 Mark Scheme
2023
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
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Page 2 of 12
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1(b)
1(a)
Question
3144/01
large vacuole
(idea that) column-shaped
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where most respiration
reactions happen
jelly-like substance, where
chemical reactions happen
contains genetic information
and controls what happens
inside the cell
controls the movement of
substances into and out of the
cell
(are packed with many) chloroplasts
any two from
mitochondria
cytoplasm
cell
membrane
Answer
Marks
Science Stage 7 Paper 1 Mark Scheme
Ignore chlorophyll
Accept (idea that) large vacuole so chloroplasts
are towards the edge of the cell or close to the
cell membrane or closer to the light = 2 marks
Accept (idea that) column-shaped so they can be
arranged closely together = 2 marks
Accept (are packed with many) chloroplasts so
they can absorb light (energy) = 2 marks
2 each correct answer = 1 mark
if two lines from a part of a cell drawn and one is
incorrect = 0 marks for that part of a cell
one or two lines correct = 1 mark
2 three lines correct = 2 marks
Further Information
2023
Question
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2
1(c)
Question
3144/01
element
compound
alloy
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a substance containing
atoms that are free to
move
an impure substance
containing the same type
of atom
a mixture containing two
different types of metal
atoms
a pure substance
containing different types
of atoms bonded together
a pure substance
containing the same type
of atom
Answer
has (plant) chloroplasts but no cell wall
Answer
Marks
Marks
Science Stage 7 Paper 1 Mark Scheme
if two lines from a material drawn and one is
incorrect = 0 marks for that material
3 each correct line = 1 mark
Further Information
1 Accept has (animal) flagella or eye spot instead
of no cell wall
Further Information
2023
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Page 5 of 12
(distance travelled by sound wave =) time x 1500 or 4 x
1500 or 6000 (m)
3(b)
3000 (m)
echo
Answer
Marks
Science Stage 7 Paper 1 Mark Scheme
3(a)
Question
3144/01
2
1
Accept ecf from distance travelled by sound
wave for second marking point
Accept correct answer with or without working =
2 marks
Further Information
2023
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4(c)
4(b)
4(a)
Question
3144/01
Page 6 of 12
it is not a moving model or (idea that) it does not show the
speed of movement
shows the different layers of the Earth
shows what happens deep under the Earth’s surface
shows volcanoes or mountains forming
shows the plates moving
shows the magma (in the mantle) moving
any two from
Accept volcano
volcanic eruption
2023
Accept shows plates move in the same direction
as the magma (in the mantle) = 2 marks
2 each correct answer = 1 mark
Accept rift valleys
Accept sea floor spreading
Accept (idea of) subduction
Accept tsunami
earthquake
3 each correct answer = 1 mark
Accept lithosphere = 2 marks
2 each correct answer = 1 mark
Further Information
Accept fold mountains
Marks
(idea of fold) mountain building
(uppermost part of) mantle
crust
Answer
Science Stage 7 Paper 1 Mark Scheme
© UCLES 2023
5
Question
3144/01
no fur
no feathers
Answer
moist skin
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fish
.......................................
scales
reptile
.......................................
dry scaly skin
bird
.......................................
feathers
mammal
.......................................
fur
vertebrate
does not show earthquakes
(idea that) it does not show how long the mountains take to
form
(idea that) there are no labels, e.g. no temperature, no
depth
amphibian
.......................................
no scales
Science Stage 7 Paper 1 Mark Scheme
Further Information
one or two correct = 1
mark
three or four correct = 2
marks
3 all five correct = 3
marks
Marks
2023
lemon juice
6(d)
Page 8 of 12
it dissipates or it is transferred to the environment or
surroundings
7(b)(ii)
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20 (J)
light (energy)
sound (energy)
thermal (energy)
Answer
Answer
Marks
Marks
Science Stage 7 Paper 1 Mark Scheme
7(b)(i)
electrical (energy)
7 or seven
6(c)
7(a)
purple
6(b)
Question
4 or four
6(a)
Question
3144/01
Further Information
Ignore it is wasted or it is lost
Accept any reasonable energy transfer process
involving sound or thermal energy, e.g. thermal
energy makes molecules move faster
1 Accept it spreads out
1
Accept light, sound and thermal in any order
Accept heat (energy) for thermal
1 all four correct = 1 mark
1
1 Ignore green
1
1
Further Information
2023
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Page 9 of 12
acid is being neutralised (by the alkali) / ora
increases or rises or gets bigger
10(b)
Answer
species produce fertile offspring / ora
donkey and horse
21
(oxygen)
Answer
(78)
nitrogen
precipitation
Question
Question
percentage by volume
gas
Answer
Marks
Marks
Marks
Science Stage 7 Paper 1 Mark Scheme
10(a)
9
8
Question
3144/01
2 each correct answer = 1 mark
Accept any indication of the correct answer,
e.g. ticking or underlining, but circling takes
precedence
1 more than one answer circled = 0 marks
Further Information
correct explanation = 1 mark
2 both ticked = 1 mark
Further Information
Accept N or N2 for nitrogen
2 each correct answer = 1 mark
Further Information
2023
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as mass (of most planets) increases so does gravity
and
relevant data to support, e.g. Jupiter has the biggest mass
and the most gravity
11(b)(ii)
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(idea that) there is no relationship
and
relevant data to support, e.g. Uranus has more mass than
Earth but has less gravity
or
as mass (of most planets) increases so does gravity except
for Uranus
and
relevant data to support, e.g. Uranus has more mass than
Earth but has less gravity
or
Jupiter
(that) pulls objects towards each other or pulls objects
towards the centre of the planet
a force
Answer
Marks
Science Stage 7 Paper 1 Mark Scheme
11(b)(i)
11(a)
Question
3144/01
correct data to support = 1 mark
2 relationship = 1 mark
1
Accept a force of attraction between two objects
= 2 marks
Accept pulls objects towards a named planet,
e.g. Earth
2 each correct answer = 1 mark
Further Information
2023
insulator(s)
13(c)
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electron(s)
13(b)
Answer
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Marks
2023
1 Ignore non-conductor
1 Accept ions(s)
Accept symbols, i.e. Fe for iron, Al for aluminium,
C for graphite
1 all four correct any order for the mark
Further Information
Do not accept harmful
(mercury nitrate) toxic or poisonous
3 each correct answer = 1 mark
Further Information
Accept inflammable
iron, steel, graphite, aluminium
Question
Marks
(ethanol) flammable
(sulfuric acid) corrosive
Answer
Science Stage 7 Paper 1 Mark Scheme
13(a)
12
Question
3144/01
© UCLES 2023
14(b)
14(a)
Question
3144/01
hawk
(hawk) decays or decomposes
hawk
lizard
grasshopper
(hawk) excretes waste
lizard
grasshopper
grasshopper
grass
Answer
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Marks
Science Stage 7 Paper 1 Mark Scheme
Accept decomposition
Accept faeces or urine or uric acid
Accept excretion
2 each correct answer = 1 mark
three or more incorrect arrows = 0 marks
one incorrect arrow = maximum 1 mark
but
one correct = 0 marks
two or three correct = 1 mark
2 all four correct = 2 marks
Further Information
2023