Unit 3: SPECIMEN CONTROLLED ASSESSMENT in GCSE
SCIENCE B
Marking Controlled Assessment
GCSE Science B
Task A
Using the marking exercises
 The following three exemplars represent candidate responses to the „Group A‟
Controlled Assessment task set out in the Specimen Assessment Material of 2011.
 The context and instructions for the tasks are included followed by the candidates‟
responses.
 Marking Grids for AO1, AO2 and AO3 are provided for each of the three tasks
 Use these grids to mark each of the candidates‟ work yourself.
PowerPoint
 In addition to this document there is also a PowerPoint presentation “Teacher
Guidance Unit 3: Marking GCSE Science B Controlled Assessment 1”.
 Once you have marked the candidate work yourself use the PowerPoint presentation
to check your marking of the three pieces of work.
 Comments and explanations are given to help explain outmarking.
GCSE Science B: Specimen Controlled Assessment
Group A Task
Finding the best antacid
What is heartburn?
Most people at some time will suffer from heartburn. Heartburn occurs when the
acid contents of the stomach pass backwards up into the oesophagus. It is also
known as stomach acid reflux. Heartburn typically occurs after eating a large meal
or drinking a lot of alcohol. Some people get heartburn when they bend over or lie
down.
What is an antacid?
Antacids are usually insoluble bases that can be taken to neutralise the excess acid
and give relief from the heartburn.
How good is an antacid?
The effectiveness of an antacid can be judged by the amount of acid it neutralises
and how quickly it neutralises the acid.
What do you need to do?
1.
Plan a practical way to answer the question, ‘Which is the most effective
antacid?’ Remember effectiveness can be judged by the amount of acid it
neutralises and how quickly it neutralises the acid.
What equipment/materials will be available to you?
0.1 mol dm-3 hydrochloric acid (You are advised to use 100 cm3 of the
acid for each antacid test.)
Three different antacids. (If you use 100 cm3 of acid for each test,
you are advised to use the normal dosage of the antacid.)
Pestle and mortar
Electronic balance
pH meter, universal indicator solution
Stopwatch/ stop clock
Beakers and measuring cylinders
One point: Do not feel that you have to use all the equipment above when
you plan your investigation.
2.
Record the hazards associated with the investigation. What do you think are
the most significant risks associated with the procedure? Write down one way
in which you
can control one of the more significant risks associated with the procedure.
3.
Carry out the procedure and collect data. Present your data clearly.
4.
Use your data to answer the question, ‘Which is the most effective antacid?’
5.
Comment on the quality of your data and the procedure you used. What
changes could you make to the procedure to improve your investigation?
Technician Guidance
Required Chemicals
0.1 mol dm-3 hydrochloric acid (100 cm3 of the acid for each antacid
test by candidate)
Two different antacids (‘TUMS Regular’, ‘Gaviscon Regular strength, Maalox
regular dose)
Candidates will need to have access to the information on the antacids
(leaflets/packets)
Pestle and mortar
Electronic balance
pH meter, universal indicator solution
Stopwatch/ stop clock
Beakers and measuring cylinders.
Teacher Guidance
You are referred to the specification pages 41-44 which stipulate the conditions for
controlled assessment.
Preparing learners for the activity
There are a number of investigations that candidates could carry out prior to
carrying out their controlled assessment. The following are deemed to be
helpful:
•
•
Determining the pH of water samples contaminated by industrial waste.
Finding the best way to neutralise an acid (e.g. water contaminated
by acidic industrial waste).
Time Control
Candidates will need a 50 minute session to plan the activity. They will need an
additional
1½ hours to carry out and complete the activity.
Task Marking
Overall this aspect has a medium level of control. Teachers at the centre
mark the controlled assessment using the generic mark scheme provided
by WJEC.
A candidate is awarded a mark for each Assessment Objective (AO) as shown
below.
•
The mark bands are hierarchical, i.e. candidates are expected to achieve the
assessment criteria in a low band in order that they can achieve in a higher
band. However, a "best fit" approach should be adopted, i.e. minor
shortcomings at one level can be overcome by a candidate's clearly meeting
the additional demands of a higher level.
• The demands of Quality of Written Communication are incorporated into the
criteria.
•
Centres are required to annotate work to show which level is achieved for each
AO and to indicate the evidence for the achievement of the level and position
within the level.
•
The marks for each AO should be entered into the tables on the controlled
assessment cover sheet and the authenticating declarations by the candidate
and teacher/lecturer signed and dated.
Marking Guidance
A candidate is awarded a mark for each Assessment Objective (AO) as shown below.
The mark bands a hierarchical, i.e. candidates are expected to achieve the
assessment criteria in a low band in order that they can achieve in a higher band.
However, a "best fit" approach should be adopted, i.e. minor shortcomings at one
level can be overcome by a candidate clearly meeting the additional demands of a
higher level.
The demands of Quality of Written Communication are incorporated into the criteria.
Centres are required to annotate work to show which level is achieved for each AO
and to indicate the evidence for the achievement of the level and position within the
level.
The marks for each AO should be recorded on the Task Record Sheet. An
authentication cover sheet signed by both the candidate and teacher must also be
completed once Task A and task B are completed. The authentication cover sheet
can be downloaded from the WJEC Science B webpage.
The flow chart below summarises the approach to take when marking tasks.
Candidate 1
1. My plan
How much acid that is neutralised
1. Firstly I will break up one tabilet of the ingestion tabilet
2. I will mesure 100 cm of the acid in a beaker
3. Then I will put in a ph meter to measure the ph of the acid
4. I will put the broken tablet to the acid and stir
5. I will check the ph by with a ph meter every 30 seconds
6. I will keep checking the ph every 30 seconds until it stops changing
7. I will do each tabilet again so I will do it all again
8. I will do all of this for two other ingestion tabilets
2. Main hazards
The hydrocloric acid is corosive and will burn your skin.
I will wear gloves to controll the acid danger
3. My results
Tabilet
0
30
60
90
180
270
360
tabilt A
ph
tabilet B
ph
tabilet C
ph
1
1
1
1
1
1
2.6
2.4
2.8
2.7
2.2
4
4.0
4.6
4.7
4.4
5.5
5.4
6.4
6.5
5.5
6.5
6.6
6.7
6.8
5.9
6.6
6.6
6.8
6.8
5.9
6.6
6.7
6.8
6.8
5.9
I will do the table with my avearages
Tabilet
0
30
60
90
180
270
360
Tabliet
A ph
tablit B
ph
tablit C
ph
1
2.5
4
5.45
6.55
6.6
6.65
1
2.7
4.6
6.45
6.75
6.8
6.8
1
2.2
3.9
5.2
5.9
5.9
5.9
Question 4
My ansswer to the question is tabilet b.
Question 5
I think I did the experiment well and my results are quite good because it
worked. I did not do tabilet c twice like the others because I ran out of
time. I would do it again if I had time. I would measure the acid with a
measuring pipete next time because that is more accurate to measure
than a measuring cylinder which I used to measure the acid.
Task Record Sheet
AO1 /6
AO2 /12
AO3 /12
Task A: Specimen Controlled Assessment
Total /30
Candidate Name:
….………………………………..…………….………….…
Centre No.
………………………….…….
b
(S)he has demonstrated a limited understanding of the
models to explain systems and processes connected to
the investigation.
c
(S)he has made some limited use of scientific and
technical terms and notation.
E,F,G
Level 1
a
The candidate has recalled, selected and communicated
some basic information relevant to the investigation with
limited understanding.
Marks
Grades
1-2

Descriptor:
c
(S)he has made some appropriate use of technical and
scientific terms and notation.
d
The candidate has developed some simple explanations
or arguments.
e
The candidate has used appropriate language to
communicate ideas with only a few errors in spelling,
punctuation and grammar.
a
The candidate has accurately recalled, selected and
communicated detailed science relevant to the
investigation with clear understanding.
b
(S)he has demonstrated a clear and detailed
understanding of the models to explain systems and
processes connected to the investigation.
c
(S)he has made an accurate and appropriate use of
technical and scientific terms and notation.
d
The candidate has clearly and logically developed their
argument and explanations.
e
The candidate has communicated ideas using
appropriate language with good spelling, punctuation and
grammar.
Total marks
B,C,D
b
(S)he has demonstrated some understanding of the
models to explain systems and processes connected to
the investigation
A,A*
a
The candidate has recalled, selected and communicated
some science relevant to the investigation with some
understanding.
3- 4
e
The candidate has communicated some simple ideas in
spite of some significant errors in spelling punctuation
and grammar.
5-6
Level 2
d
Level 3
Recall, select and communicate their knowledge and understanding of science
AO1
6
d
S(he) has collected some data of limited accuracy or
relevance to an investigation.
e
The candidate has demonstrated a limited ability to
process and analyse data.
a
The candidate has used appropriate skills, knowledge
and understanding when outlined a practical plan to
answer a scientific question or test hypothesis.
b
The candidate has recognised some hazards and risks
associated with the investigation.
c
S(he) has devised an appropriate method to collect
data.
d
e
a
b
S(he) has collected sufficient and suitable data.
The candidate has used appropriate methods to
process and analyse data.
The candidate has independently applied skills,
knowledge and understanding to plan a practical way
to effectively answer a scientific question or test
hypotheses.
The candidate has assessed hazards and risks to
manage safety in the investigation.
d
S(he) has devised an appropriate and effective method
to collect data.
S(he) has collected sufficient, accurate, appropriate
and high quality data.
e
The candidate has used appropriate methods to
process and analyse data accurately and effectively.
c
E,F,G
S(he) has devised simple method to collect data.
B,C,D
c
A,A*
The candidate has recognised some hazards
associated with an investigation.
1-4
b
5-8
Level 1
Level 2
a
The candidate has applied limited skills and knowledge
when planning to answer a scientific question or test
hypotheses.
Marks
Grades
9-12

Descriptor:
Level 3
Apply skills, knowledge and understanding of science in practical and other contexts
AO2
Total marks
12
The candidate has made a limited attempt to analyse
and interpret data to make a simple conclusion.
b
S(he) has made limited use of evidence and
appropriate scientific ideas.
c
The candidate has given a limited evaluation of an
investigation commenting upon the data or
procedure.
E,F,G
Level 1
a
Marks
Grades
1-4

Descriptor:
d
(S)he made some reference to evidence and
appropriate scientific ideas supporting the conclusion.
c
The candidate has given a simple evaluation of an
investigation commenting upon the data and
method(s) of data collection.
B,C,D
b
A,A*
The candidate has made an adequate analysis and
interpretation of data to make a clear conclusion.
5-8
a
9-12
Level 2
e
d
e
a
b
Level 3
Analyse and evaluate evidence, make reasoned judgements and draw conclusions based on evidence
AO3
c
d
e
The candidate has independently and thoroughly
analysed and interpreted data to make a detailed
conclusion.
(S)he has made a valid conclusion that is clearly
based upon, and argued from, all the available
evidence from the investigation, and makes a clear
and appropriate use of scientific ideas.
The candidate has given a detailed evaluation of an
investigation commenting upon the data and
method(s) of data collection.
Their evaluation shows an awareness of the
limitations of the available evidence.
(S)he has explained how to improve the method of
data collection to improve work.
Total marks
12
Candidate 2
1. Plan
I will crunch up one indigestion tablet using a pestle and morter. Then
I will measure100 cm3 using a measuring cylinder and then put it into
a beaker. After this I will get a pH meter and measure the pH of the
hydrochloric acid. Next I will add the crunched tablet to the acid and
stir and then I will check every half minute the pH by with the pH
meter which I will right down. I will keep on doing this until the ph
stays the same. I will do all this again for the other tablets as well. I
will make sure I use the same amount of acid each time.
2. Main hazards
hazard
Acid
risk
prucaution
it is irritanrt
Glass beaker
Tablets
It could splash
into your eyes or
get in eyes from
off the fingers
It can be sharpe It might be broken
if broken
and cut you
it is a irritanrt
it might get in
eyes when
broken up
Be careful
when pouring
tell teacher if is
spilt
Make sure that
the beaker isnt
broken by
putting away
from edge of
bench
keep out of
eyes
3. Results
pH
Time
(seconds)
Brand A
Brand B
Brand C
0
30
60
90
180
270
360
420
1
1
1
3
2.3
2.4
5
4.6
4.8
6
5.7
6
6.5
6.1
6.3
6.7
6.2
6.3
6.8
6.2
6.3
6.8
6.2
6.3
Graph of Results
Analysis
The reason why I did this experiment was to find an answer to the
question which is the best indigestion tablet. My experiment shows that
Brand A indigestion tables are the best at neutralising the acid.
Indigestion is caused by too much acid. A good tablet will neutralise the
acid. All the tablets neutralise some of the acid but brand A does this the
most. I know this because the ph changes the most with the tablet. Acids
have low pHs. When we neutralise the acid the pH goes up towards
neutral. Tablet A has the biggest effect on the pH so must be the best at
neutralising acid. The other two were very similar and are about the
same at neutralising acid.
I know that indigestion tables have insoluble bases in them. when they
react with acids they form a salt and water. Salts are neutral
A word equation for the neutralisation tablet is:
Acid + base  salt + water
I also think that A was best because it was the fastest at neutralising the
acid but there was not much difference between the tablets so this does
not make so much difference.
Evaluation
I think my results look accurate but I could have done each tablet more
than once to make sure that my results are accurate. I could measure
out the acid more accurately with something like a pippete. Some of the
tablet might have spilt or stuck to the apparatus and not have got into the
acid. This would affect my results because some of the tablet would not
have neutralised the acid. this would bring in an error. Doing the
experiment severaval times would show this mistake.
Task Record Sheet
AO1 /6
AO2 /12
AO3 /12
Task A: Specimen Controlled Assessment
Total /30
Candidate Name:
….………………………………..…………….………….…
Centre No.
………………………….…….
b
(S)he has demonstrated a limited understanding of the
models to explain systems and processes connected to
the investigation.
c
(S)he has made some limited use of scientific and
technical terms and notation.
E,F,G
Level 1
a
The candidate has recalled, selected and communicated
some basic information relevant to the investigation with
limited understanding.
Marks
Grades
1-2

Descriptor:
c
(S)he has made some appropriate use of technical and
scientific terms and notation.
d
The candidate has developed some simple explanations
or arguments.
e
The candidate has used appropriate language to
communicate ideas with only a few errors in spelling,
punctuation and grammar.
a
The candidate has accurately recalled, selected and
communicated detailed science relevant to the
investigation with clear understanding.
b
(S)he has demonstrated a clear and detailed
understanding of the models to explain systems and
processes connected to the investigation.
c
(S)he has made an accurate and appropriate use of
technical and scientific terms and notation.
d
The candidate has clearly and logically developed their
argument and explanations.
e
The candidate has communicated ideas using
appropriate language with good spelling, punctuation and
grammar.
Total marks
B,C,D
b
(S)he has demonstrated some understanding of the
models to explain systems and processes connected to
the investigation
A,A*
a
The candidate has recalled, selected and communicated
some science relevant to the investigation with some
understanding.
3- 4
e
The candidate has communicated some simple ideas in
spite of some significant errors in spelling punctuation
and grammar.
5-6
Level 2
d
Level 3
Recall, select and communicate their knowledge and understanding of science
AO1
6
d
S(he) has collected some data of limited accuracy or
relevance to an investigation.
e
The candidate has demonstrated a limited ability to
process and analyse data.
a
The candidate has used appropriate skills, knowledge
and understanding when outlined a practical plan to
answer a scientific question or test hypothesis.
b
The candidate has recognised some hazards and risks
associated with the investigation.
c
S(he) has devised an appropriate method to collect
data.
d
e
a
b
S(he) has collected sufficient and suitable data.
The candidate has used appropriate methods to
process and analyse data.
The candidate has independently applied skills,
knowledge and understanding to plan a practical way
to effectively answer a scientific question or test
hypotheses.
The candidate has assessed hazards and risks to
manage safety in the investigation.
d
S(he) has devised an appropriate and effective method
to collect data.
S(he) has collected sufficient, accurate, appropriate
and high quality data.
e
The candidate has used appropriate methods to
process and analyse data accurately and effectively.
c
E,F,G
S(he) has devised simple method to collect data.
B,C,D
c
A,A*
The candidate has recognised some hazards
associated with an investigation.
1-4
b
5-8
Level 1
Level 2
a
The candidate has applied limited skills and knowledge
when planning to answer a scientific question or test
hypotheses.
Marks
Grades
9-12

Descriptor:
Level 3
Apply skills, knowledge and understanding of science in practical and other contexts
AO2
Total marks
12
The candidate has made a limited attempt to analyse
and interpret data to make a simple conclusion.
b
S(he) has made limited use of evidence and
appropriate scientific ideas.
c
The candidate has given a limited evaluation of an
investigation commenting upon the data or
procedure.
E,F,G
Level 1
a
Marks
Grades
1-4

Descriptor:
d
(S)he made some reference to evidence and
appropriate scientific ideas supporting the conclusion.
c
The candidate has given a simple evaluation of an
investigation commenting upon the data and
method(s) of data collection.
B,C,D
b
A,A*
The candidate has made an adequate analysis and
interpretation of data to make a clear conclusion.
5-8
a
9-12
Level 2
e
d
e
a
b
Level 3
Analyse and evaluate evidence, make reasoned judgements and draw conclusions based on evidence
AO3
c
d
e
The candidate has independently and thoroughly
analysed and interpreted data to make a detailed
conclusion.
(S)he has made a valid conclusion that is clearly
based upon, and argued from, all the available
evidence from the investigation, and makes a clear
and appropriate use of scientific ideas.
The candidate has given a detailed evaluation of an
investigation commenting upon the data and
method(s) of data collection.
Their evaluation shows an awareness of the
limitations of the available evidence.
(S)he has explained how to improve the method of
data collection to improve work.
Total marks
12
CANDIDATE 3
1. Plan
1. Grind up completely one indigestion tablet into fine particles
2. Measure out 100 cm3 of hydrochloric acid into a beaker using a
measuring cylinder
3. Put the pH meter into the beaker carefully and measure the pH of
the hydrochloric acid.
4. Add the ground up tablet to the acid and stir. Make sure all the
tablet is added
5. Read the pH with a pH meter every 30 seconds
6. Record the pH every 30 seconds until the pH stops changing
7. Repeat the experiment
8. Repeat the above for two other brands of tablet
2.Risk assessment
HAZARD
Dilute hydrochloric
acid is an irritant
and is corrosive
Glass equipment
Powder from
tablets is an irritant
RISK
Handling the hydrochloric acid
may result in spillages which
could get on the hands or
clothes.
Stirring the acid may cause
splashing of the acid. It might
get in the eyes.
Rubbing eyes with fingers which
have acid on them.
There may be chips to
glassware which could cause
cuts
The powder from the tablets
might get in the eyes
PRECAUTION
Make sure any
spills are cleaned
up.
Wear eye safety
glasses to
protect the eyes
Check for
damage
Low risk – careful
handling
3. Results
Time (s)
0
30
60
90
180
270
360
1.0
1.0
1.0
1.0
1.0
1.0
2.6
2.4
2.8
2.7
2.2
2.3
4.0
4.0
4.6
4.7
4.6
5.6
5.5
5.4
6.4
6.5
5.7
5.7
6.5
6.6
6.6
6.8
5.9
5.9
6.5
6.6
6.9
6.9
5.9
5.9
6.5
6.6
6.9
6.9
5.9
5.9
Time (s)
0
30
60
90
180
270
360
Brand A
Brand B
Brand C
1.0
1.0
1.0
2.5
2.6
2.3
4.0
4.7
4.6
5.5
6.5
5.7
6.6
6.7
5.9
6.6
6.9
5.9
6.7
6.9
5.9
Brand A
pH
Brand B
Brand C
Averages
pH
Graph of Results
Analysis of the results
The reason for doing this experiment was to answer the question which
is the best indigestion tablet. The experiment shows that Brand B
indigestion tables are the most effective. I think this because these were
the best at neutralising the acid.
Indigestion is caused by too much acid in the stomach. A good tablet will
neutralise some of the acid. Brand B has the biggest effect on the pH.
The pH starts low but tablet B increases the pH the most. This means
that brand B has neutralised the most acid. This makes it the most
effective.
I noticed that tablets fizzed in the acid and I think that they contained
carbonates. Carbonates neutralise acids by making salts and carbon
dioxide and water. Salts are neutral.
Equation: Acid + carbonate  salt + carbon dioxide + water
Brand C was the poorest at neutralising. This is shown by the pH not
going up so much. The pH finished at 5.9 which was lower than the other
two. This means less acid was neutralised.
I also think that tablet B was the best because it neutralised the acid
fastest but there was not much difference between the tablets so this is
not so important a factor.
Evaluation
I did the experiment twice with each tablet and the results were very
similar in each case. The largest difference was only one decimal point. I
think that I may have written down one of my readings for tablet C wrong
because it is very different to the other result. I have highlighted this
number in the table. I ignored this number when I worked out my
average. To be sure that this result is right I should do this tablet once
more. I did not have enough time on the day to do this.
To improve my procedure, I could do a titration to find out exactly how
much acid is neutralised by the tablet. Titration eqiupment will allow me
to more accurately measure the volumes. This would give more exact
results. It would not tell me which is fastest at neutralising but they were
all similar on this.
Task Record Sheet
AO1 /6
AO2 /12
AO3 /12
Task A: Specimen Controlled Assessment
Total /30
Candidate Name:
….………………………………..…………….………….…
Centre No.
………………………….…….
b
(S)he has demonstrated a limited understanding of the
models to explain systems and processes connected to
the investigation.
c
(S)he has made some limited use of scientific and
technical terms and notation.
E,F,G
Level 1
a
The candidate has recalled, selected and communicated
some basic information relevant to the investigation with
limited understanding.
Marks
Grades
1-2

Descriptor:
c
(S)he has made some appropriate use of technical and
scientific terms and notation.
d
The candidate has developed some simple explanations
or arguments.
e
The candidate has used appropriate language to
communicate ideas with only a few errors in spelling,
punctuation and grammar.
a
The candidate has accurately recalled, selected and
communicated detailed science relevant to the
investigation with clear understanding.
b
(S)he has demonstrated a clear and detailed
understanding of the models to explain systems and
processes connected to the investigation.
c
(S)he has made an accurate and appropriate use of
technical and scientific terms and notation.
d
The candidate has clearly and logically developed their
argument and explanations.
e
The candidate has communicated ideas using
appropriate language with good spelling, punctuation and
grammar.
Total marks
B,C,D
b
(S)he has demonstrated some understanding of the
models to explain systems and processes connected to
the investigation
A,A*
a
The candidate has recalled, selected and communicated
some science relevant to the investigation with some
understanding.
3- 4
e
The candidate has communicated some simple ideas in
spite of some significant errors in spelling punctuation
and grammar.
5-6
Level 2
d
Level 3
Recall, select and communicate their knowledge and understanding of science
AO1
6
d
S(he) has collected some data of limited accuracy or
relevance to an investigation.
e
The candidate has demonstrated a limited ability to
process and analyse data.
a
The candidate has used appropriate skills, knowledge
and understanding when outlined a practical plan to
answer a scientific question or test hypothesis.
b
The candidate has recognised some hazards and risks
associated with the investigation.
c
S(he) has devised an appropriate method to collect
data.
d
e
a
b
S(he) has collected sufficient and suitable data.
The candidate has used appropriate methods to
process and analyse data.
The candidate has independently applied skills,
knowledge and understanding to plan a practical way
to effectively answer a scientific question or test
hypotheses.
The candidate has assessed hazards and risks to
manage safety in the investigation.
d
S(he) has devised an appropriate and effective method
to collect data.
S(he) has collected sufficient, accurate, appropriate
and high quality data.
e
The candidate has used appropriate methods to
process and analyse data accurately and effectively.
c
E,F,G
S(he) has devised simple method to collect data.
B,C,D
c
A,A*
The candidate has recognised some hazards
associated with an investigation.
1-4
b
5-8
Level 1
Level 2
a
The candidate has applied limited skills and knowledge
when planning to answer a scientific question or test
hypotheses.
Marks
Grades
9-12

Descriptor:
Level 3
Apply skills, knowledge and understanding of science in practical and other contexts
AO2
Total marks
12
The candidate has made a limited attempt to analyse
and interpret data to make a simple conclusion.
b
S(he) has made limited use of evidence and
appropriate scientific ideas.
c
The candidate has given a limited evaluation of an
investigation commenting upon the data or
procedure.
E,F,G
Level 1
a
Marks
Grades
1-4

Descriptor:
d
(S)he made some reference to evidence and
appropriate scientific ideas supporting the conclusion.
c
The candidate has given a simple evaluation of an
investigation commenting upon the data and
method(s) of data collection.
B,C,D
b
A,A*
The candidate has made an adequate analysis and
interpretation of data to make a clear conclusion.
5-8
a
9-12
Level 2
e
d
e
a
b
Level 3
Analyse and evaluate evidence, make reasoned judgements and draw conclusions based on evidence
AO3
c
d
e
The candidate has independently and thoroughly
analysed and interpreted data to make a detailed
conclusion.
(S)he has made a valid conclusion that is clearly
based upon, and argued from, all the available
evidence from the investigation, and makes a clear
and appropriate use of scientific ideas.
The candidate has given a detailed evaluation of an
investigation commenting upon the data and
method(s) of data collection.
Their evaluation shows an awareness of the
limitations of the available evidence.
(S)he has explained how to improve the method of
data collection to improve work.
Total marks
12