GCSE
Additional Applied Science
AAS1FP
Mark scheme
4505
June 2015
Version/Stage: Final v1.0
Mark schemes are prepared by the Lead Assessment Writer and considered, together with the
relevant questions, by a panel of subject teachers. This mark scheme includes any amendments
made at the standardisation events which all associates participate in and is the scheme which was
used by them in this examination. The standardisation process ensures that the mark scheme covers
the students’ responses to questions and that every associate understands and applies it in the same
correct way. As preparation for standardisation each associate analyses a number of students’
scripts: alternative answers not already covered by the mark scheme are discussed and legislated for.
If, after the standardisation process, associates encounter unusual answers which have not been
raised they are required to refer these to the Lead Assessment Writer.
It must be stressed that a mark scheme is a working document, in many cases further developed and
expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark
schemes on the basis of one year’s document should be avoided; whilst the guiding principles of
assessment remain constant, details will change, depending on the content of a particular
examination paper.
Further copies of this Mark Scheme are available from aqa.org.uk
Copyright © 2015 AQA and its licensors. All rights reserved.
AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this
booklet for their own internal use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any
material that is acknowledged to a third party even for internal use within the centre.
MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Information to Examiners
1. General
The mark scheme for each question shows:
•
•
•
•
•
the marks available for each part of the question
the total marks available for the question
the typical answer or answers which are expected
extra information to help the Examiner make his or her judgement and help to delineate what is
acceptable or not worthy of credit or, in discursive answers, to give an overview of the area in
which a mark or marks may be awarded
the Assessment Objectives and specification content that each question is intended to cover.
The extra information is aligned to the appropriate answer in the left-hand part of the mark scheme
and should only be applied to that item in the mark scheme.
At the beginning of a part of a question a reminder may be given, for example: where
consequential marking needs to be considered in a calculation; or the answer may be on the
diagram or at a different place on the script.
In general the right-hand side of the mark scheme is there to provide those extra details which
confuse the main part of the mark scheme yet may be helpful in ensuring that marking is
straightforward and consistent.
2. Emboldening and underlining
2.1
In a list of acceptable answers where more than one mark is available ‘any two from’ is
used, with the number of marks emboldened. Each of the following bullet points is a
potential mark.
2.2
A bold and is used to indicate that both parts of the answer are required to award the mark.
2.3
Alternative answers acceptable for a mark are indicated by the use of or. Different terms in
the mark scheme are shown by a / ; eg allow smooth / free movement.
2.4
Any wording that is underlined is essential for the marking point to be awarded.
3. Marking points
3.1
Marking of lists
This applies to questions requiring a set number of responses, but for which students have
provided extra responses. The general principle to be followed in such a situation is that ‘right +
wrong = wrong’.
Each error / contradiction negates each correct response. So, if the number of error /
contradictions equals or exceeds the number of marks available for the question, no marks can be
awarded.
However, responses considered to be neutral (indicated as * in example 1) are not penalised.
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Example 1: What is the pH of an acidic solution? (1 mark)
Student
Response
1
2
3
green, 5
red*, 5
red*, 8
Marks
awarded
0
1
0
Example 2: Name two planets in the solar system. (2 marks)
Student
1
2
3.2
Response
Neptune, Mars, Moon
Neptune, Sun, Mars,
Moon
Marks awarded
1
0
Use of chemical symbols / formulae
If a student writes a chemical symbol / formula instead of a required chemical name, full
credit can be given if the symbol / formula is correct and if, in the context of the question,
such action is appropriate.
3.3
Marking procedure for calculations
Full marks can be given for a correct numerical answer, without any working shown.
However, if the answer is incorrect, mark(s) can be gained by correct substitution / working
and this is shown in the ‘extra information’ column or by each stage of a longer calculation.
3.4
Interpretation of ‘it’
Answers using the word ‘it’ should be given credit only if it is clear that the ‘it’ refers to the
correct subject.
3.5
Errors carried forward
Any error in the answers to a structured question should be penalised once only.
Papers should be constructed in such a way that the number of times errors can be carried
forward is kept to a minimum. Allowances for errors carried forward are most likely to be
restricted to calculation questions and should be shown by the abbreviation e.c.f. in the
marking scheme.
3.6
Phonetic spelling
The phonetic spelling of correct scientific terminology should be credited unless there is a
possible confusion with another technical term.
3.7
Brackets
(…..) are used to indicate information which is not essential for the mark to be awarded but
is included to help the examiner identify the sense of the answer required.
3.8
Ignore / Insufficient / Do not allow
Ignore or insufficient are used when the information given is irrelevant to the question or not
enough to gain the marking point. Any further correct amplification could gain the marking
point.
Do not allow means that this is a wrong answer which, even if the correct answer is given,
will still mean that the mark is not awarded.
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Quality of Written Communication and levels marking
In Question 9 students are required to produce extended written material in English, and will be
assessed on the quality of their written communication as well as the standard of the scientific
response.
Students will be required to:
• use good English
• organise information clearly
• use specialist vocabulary where appropriate.
The following general criteria should be used to assign marks to a level:
Level 1: basic
• Knowledge of basic information
• Simple understanding
• The answer is poorly organised, with almost no specialist terms and their use
demonstrating a general lack of understanding of their meaning, little or no detail
• The spelling, punctuation and grammar are very weak.
Level 2: clear
• Knowledge of accurate information
• Clear understanding
• The answer has some structure and organisation, use of specialist terms has been
attempted but not always accurately, some detail is given
• There is reasonable accuracy in spelling, punctuation and grammar, although there may
still be some errors.
Level 3: detailed
• Knowledge of accurate information appropriately contextualised
• Detailed understanding, supported by relevant evidence and examples
• Answer is coherent and in an organised, logical sequence, containing a wide range of
appropriate or relevant specialist terms used accurately.
• The answer shows almost faultless spelling, punctuation and grammar.
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
Answers
Extra information
Mark
AO / Spec Ref
1(a)
C
1
AO1
3.3.2.4
1(b)
B
1
AO1
3.3.2.4
Total
2
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
Answers
2(a)
Extra
information
Mark
AO /
Spec Ref
3
AO1/AO2
3.3.5.1.3,
3.3.6.1.1
2(b)
Total
Good health and safety practices
1
AO2
Looking after equipment and checking
equipment
1
3.3.1 /
3.3.2
5
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
3(a)(i)
Answers
Y
Extra information
Mark
AO / Spec
Ref
1
AO2
3.3.1.1
3(a)(ii)
V
1
AO2
3.3.1.1
3(a)(iii)
U
1
AO2
3.3.1.1
3(a)(iv)
W
1
AO2
3.3.1.1
3(b)
reliability
1
AO1
3.3.1.1
Total
5
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Mark
AO / Spec
Ref
J = platelet
1
AO1
K = white blood cell
1
3.3.6.6.1
L = red blood cell
1
plasma
1
Question
4(a)(i)
4(a)(ii)
Answers
Extra information
AO1
3.3.6.6.1
4(b)(i)
4(%)
1
AO2
3.3.6.6.2
4(b)(ii)
4(c)(i)
blood groups are not
unique owtte
eg lots of people have the same
blood type/ more than one person in
a blood group
nucleus
1
AO1
3.3.6.6.11
1
AO1
3.3.6.6.4
4(c)(ii)
semen / saliva
allow urine / sweat
1
accept “spit”
4(c)(iii)
A and C
both must be correct
AO1
3.3.6.6
1
AO3
3.3.6.6.9
Total
9
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
5(a)
Answers
any two from:
•
•
•
•
5(b)
5(c)
Extra information
size
shape
texture
colour
Mark
AO / Spec
Ref
2
AO3
3.3.6.5.2
accept round
accept spikey / surface pattern
greater resolution / allows you to
see smaller objects
answer must be a comparative
circle drawn around an electron
accept circle drawn around
either / both electrons
1
allow greater magnification /
more detail
AO2
3.3.6.5
1
AO1
3.3.6.5
circles drawn around an
electron plus any other particle
scores zero
Total
4
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
6(a)(i)
Answers
Extra information
an insulator
Mark
AO / Spec
Ref
1
AO1
3.3.4.2.11
6(a)(ii)
a conductor
1
AO1
3.3.4.2.7
6(a)(iii)
an alloy
1
AO1
3.3.4.2.10
6(b)
6(c)(i)
6(c)(ii)
Total
advantage: highest/ higher
conductivity
must be a comparison
1
disadvantage: highest/ higher
cost
accept most / more expensive
1
(tested by) British Standards
(Institute)
accept BSI
has been tested / approved /
meets safety standards
accept: safe to use / plug is fit
for purpose
AO3
3.3.4.2.7
allow highest density / heaviest
1
AO1
3.3.4.1.2
1
AO2
3.3.4.1.1
7
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
7(a)
Answers
Extra information
23 (minutes)
Mark
AO / Spec
Ref
2
AO2
allow 1 mark for 345
15
7(b)(i)
3.3.4.2
max 2 marks
AO3
no marks for selected
material
3.3.4.2
both points must be for the
same cylinder
either
steel
shortest replacement cylinder
time
accept takes one day
cheaper than carbon wrapped
1
1
allow lasts longer if
consistent with answer given
in 7(a)
or
aluminium
2
any two from:
•
•
•
lighter than steel
holds more gas than steel
lasts longer than steel
•
cheapest / no cost of
cylinder
faster cylinder
replacement time than
carbon
•
check 7(a) must be less than
30 minutes
accept cheaper than carbon
to refill
or
carbon wrapped
lightest cylinder
accept (holds) 600 litres
1
holds most oxygen / gas
accept lasts longer if 7(a) is
less than 40
1
Question 7 continues on the next page
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question 7 continued
7(b)(ii)
max 2 marks
both points must be for the same
cylinder
either
steel
any two from:
• heaviest
• lasts shortest time
•
•
AO3
3.3.4.2
2
allow if consistent with answer
given in 7(a)
holds least
costs more than aluminium
or
aluminium
any two from:
• heavier than carbon
• holds less than carbon
• lasts shorter time than
carbon
• longer cylinder replacement
time than steel
2
allow shortest time if answer for
7(a) is greater than 30 minutes
or
carbon wrapped
costs most
7(c)
accept costs £300 per year / £7 per
refill
longer cylinder replacement time
than steel or aluminium
1
8000 (kg/m3)
2
for 1 mark:
Total
1
AO2
3.3.4.2.5
2.4
0.0003
8
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
8(a)(i)
Answers
CuSO4
Extra information
accept SO4Cu
Mark
AO / Spec
Ref
1
AO2
do not accept Cu2+ SO428(a)(ii)
blue (solid)
accept white
3.3.6.2
1
AO1
3.3.6.2
8(a)(iii)
greeny-blue (flame)
accept blue
1
3.3.6.2.7,8
do not accept green
8(a)(iv)
8(a)(v)
blue precipitate / solid
white precipitate / solid
AO1
do not accept precipitate
/ solid on its own
1
do not accept precipitate
/ solid on its own
1
AO1
3.3.6.2.12
AO1
3.3.6.2.12
accept milky
ignore cloudy
8(b)
iron [(lll)]
do not accept iron on its
own, only as part of the
name of a compound
1
AO3
3.3.6.2
accept iron III on its own
chloride
Total
accept chloride on its
own but not chlorine
1
7
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Question
Answers
Extra information
Mark
9
AO / Spec Ref
AO1, AO2, AO3
6
3.3.5.4.1a,6,13,15
Marks awarded for this answer will be determined by the Quality of Written Communication (QWC) as
well as the standard of the scientific response. Examiners should also refer to the information on page
5 and apply a ‘best-fit’ approach to the marking.
0 marks
Level 1 (1–2 marks)
Level 2 (3–4 marks)
Level 3 (5–6 marks)
No relevant
content
At least one advantage
of their chosen method
is given
At least one advantage of
their chosen method is given
Advantages of their chosen
method are given
and
and
linked to an explanation of
the advantage, which may be
limited or lack cohesion
linked to at least one clear
detailed explanation of the
advantages
but
no explanation of the
advantage(s) is given
Examples of the points made in the response:
extra information
Advantages of intensive
• higher output because of the use of chemical fertilisers to
increase growth
• fungicides can be used to destroy fungi that cause disease
• use of herbicides to kill weeds and promote growth of crops
• less damage to crops because of use of pesticides
• large machines used / less labour intensive
• food produced more cheaply
• large fields of a single crop (monoculture)
Advantages of organic
• no damage to habitats from fertilisers / pesticides / herbicides
(washed into streams)
• less chance of eutrophication because less nitrogen run off
• no residue of chemicals in crops
• no chance of killing beneficial species by using pesticides
• saves on fuels as less machinery used
• no expensive machinery
• soil retains more nutrients as monoculture not used
• produce may be more tasty
• people favour organic food (no added chemicals)
Total
6
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MARK SCHEME – GCSE ADDITIONAL APPLIED SCIENCE – AAS1FP – JUNE 2015
Extra information
Mark
AO / Spec
Ref
clearly labelled in vertical for
vital capacity
accept the label vital capacity on
the long line from 6 to 1 litres
1
AO1
0.5 (litres)
accept 0.45-0.55
1
Question
10(a)
10(b)
Answers
3.3.3.2.2c
AO2
3.3.3.2.2c
10(c)
12 (breaths per minute)
1
AO2
3.3.3.2.2c
10(d)
(breathing rate increases) to get
more oxygen
1
(because) the muscles need
(more) oxygen
1
AO1
3.3.3.2.1
1
to release energy
allow correct reference to
respiration i.e. increased rate of
respiration/ aerobic/ not
anaerobic/ no lactic acid
(and) to remove more CO2
Total
1
7
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