C ontrolled A ssessment U nit - CAU I nvestigative S kills A ssessment - ISA
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Transcript of C ontrolled A ssessment U nit - CAU I nvestigative S kills A ssessment - ISA
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
Section 2 Exam:• Up to 50 minutes is allowed for this. • The test may be taken in the normal teaching room,
provided that you can be accommodated in such a way as to prevent any copying or unauthorised collaboration. However the test will usually take place in the hall, dance studio or drama studio depending on their availability.
• If you normally have a reader, extra time, scribe etc. for exams then you will have the same arrangements made for the ISA exam.
• Section 1 of the ISA will contain questions concerning conclusions and evaluation and is worth 30 marks of the overall 50 allocated to the Controlled Assessment.
• You may use your Candidate Research notes sheet, which you filled in during your research.
• You will also be given a data sheet with 4 case studies.
Section 2 Exam:There are normally 4 questions, some of these questions are made up of more than one part:1.Analyse and evaluate your results
a) What were the variables in the investigation you did?b) - e) These questions are on a variety of topics
and may vary in number from ISA to ISA
2.Analyse and evaluate the data given in the case studiesa) Sketch graphb) Explain whether or not the results on the Secondary
data sheet support the given hypothesisc) Analysis of Case Study 4
This is only a guide there may be more questions based on the case studies
3.How could the results from your investigation be useful in the context that you have researched?
3 marks4.Submit the graph or bar chart you have drawn of your results
4 marks
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Variables:
• These are physical, chemical or biological quantities or characteristics
You may be asked a question similar to this in the section 2 exam:• What were the variables in the investigation that you
did?• The independent variable was • The dependent variable was • One control variable was
3 marks
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1 Any one variable correctly identified
2 Any two variables correctly identified
3 Any three variables correctly identified
State, give, name, write down:• Only a short answer is required, not an explanation or a description. Often it can be answered with a single word, phrase or sentence.
• If the question asks the you to state, give, or write down one (or two etc) examples, they should write down only the specified number of answers, or they may lose marks for any wrong examples given.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Resolution:
• This is the smallest change in quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.
You may be asked a question similar to this in the section 2 exam:• Think about the way in which you took your
measurements.• Resolution means the smallest scale division on the
measuring instrument that you were using.• What was the resolution of your measurement for…• Do you think that this resolution was appropriate for this
investigation?• Explain your answer
3 marks
7 • ISA section 2 exam – Science A
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1A correct value for the resolution is given
ORA sensible but incorrect value is given for the resolution, with a
correct statement appropriate to the resolution they have given.
2A correct value for the resolution is given
ORA correct statement as to whether or not the resolution was
appropriate is given, but the explanation is not clear
3A correct value for the resolution is given
ORA correct statement as to whether or not the resolution was
appropriate is given with a clear explanation
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Repeatable:
• A measurement is repeatable if the original experimenter repeats the investigation using the same method and obtains the same results.
You may be asked a question similar to this in the section 2 exam:• Look at your results.• Did you repeat any of the results in your
investigation?• Explain why you did or did not repeat any
of your results.• You explanation should include examples
from your results.3 marks
7 • ISA section 2 exam – Science A
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1There is a correct statement regarding whether or not any measurements were
repeatedThere is mention of the presence or absence or anomalous results
2There is a correct statement regarding whether or not any measurements were
repeatedThere is reference to either anomalous results or to systematic or random
uncertainties
3There is a correct statement regarding whether or not any measurements were
repeated and a clear indication of which results were repeatedThere is reference to either anomalous results or to systematic or random
uncertainties, and the effects that these would cause
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 2 exam:• In your investigation you changed the
concentration / mass of X.• What was the range of this variable? Give
the units.• The range was from ……… to ………• If you had been able to use another value
of this variable, either within or outside this range what value would you have chosen?
• Give a reason for your answer3 marks
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1At least one end of the range is correctly stated.
Another value of the independent variable is suggested, although it may not be appropriate.
2The range is correctly stated, according to the candidate’s own results.Another appropriate value of the independent variable is suggested.
The reason for the additional value is unclear or inappropriate.
3The range is correctly stated, according to the candidate’s own results.Another appropriate value of the independent variable is suggested.
The reason for the additional value is clear and appropriate.
Range:• The maximum and minimum values of the
independent or dependent variables; important in ensuring that any pattern is detected.
Explain:• You should make something clear, or state the reasons for something happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Hypothesis:
• A proposal intended to explain certain facts or observations
You may be asked a question similar to this in the section 2 exam:• The hypothesis that you were
given before you started the investigation was …
• Do your results support this hypothesis?
• Explain your answer.3 marks
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1 A simple correct statement is made as to whether or not the results support the hypothesis with an attempt at an explanation
2A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a simple description of a correctly
identified pattern or lack of pattern
3A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a detailed description of a correctly
identified pattern or lack of pattern.
Explain:• You should make something clear, or state the reasons for something happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Reproducible:
• A measurement is reproducible if the investigation is repeated by another person, or by using equipment or techniques, and the same results are obtained.
You may be asked a question similar to this in the section 2 exam:• You have been given a set of results
obtained by other people. • Do these results other results show that
this investigation is reproducible? • Explain your answer using examples from
the results.3 marks
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1 A simple statement is made as to whether or not the pattern of the other results is similar to the candidate’s results
2A simple statement is made as to whether or not the pattern of the
other results is similar to the candidate’s results and an explanation is provided using either an example from the other results or a correctly
identified pattern
3A simple statement is made as to whether or not the pattern of the
other results is similar to the candidate’s results and a detailed explanation is provided using either; two examples from the other results or a correctly identified and described pattern in the results
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
An example of a poor answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 2 exam:• If you were to repeat your experiment,
would you make any changed to your method?
• Explain why you would or would not make any changes, using examples from your results.
3 marks
7 • ISA section 2 exam – Science A
Repeatable:• A measurement is repeatable if the
original experimenter repeats the investigation using the same method and obtains the same results.
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1 Simple appropriate suggestion given as to why changes would be made
2 Simple appropriate suggestion given as to why changes would be made together with examples quoted from the results
3Simple appropriate suggestion given as to why changes would be made together with examples quoted from the results plus an explanation of why these changes would improve the results
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 2 exam:• You have been given a Secondary Data Sheet that
provides results from similar investigations. • Draw a sketch graph of the results in Case Study 1.
3 marks
7 • ISA section 2 exam – Science A
Sketch graph:• A line graph, not necessarily on a grid, that shows the
general shape of the relationship between two variables. It will not have any points plotted and although the axes should be labelled they may not be scaled.
Explain:• You should make something clear, or state the reasons
for something happening.• The points in the answer must be linked coherently and
logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1 Both axes labelled with the variables and units
2 Both axes labelled with the variables and units and an appropriate line drawn
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Data:
• Information, either qualitative or quantitative, that has been collected.
You may also be asked a question similar to this in the section 2 exam• Explain whether or not the results on the
Secondary Data Sheet support the hypothesis you were given.
• To gain full marks your explanation should include appropriate examples from the results in Case studies 1, 2 and 3.
3 marksYou may also be asked a similar question on a Additional Science or Separate Science ISA
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1A clear statement is made that Case study 1 supports the hypothesis and a simple correct statement is made about one of the other case
studies
2A clear statement is made that Case study 1 supports the hypothesis
and correct statements are made about both Case studies 2 and 3 supported by a more detailed explanation of one of them.
3A clear statement is made that Case study 1 supports the hypothesis
and correct statements are made about both Case studies 2 and 3 supported by a more detailed explanation of both of them.
Explain• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Relationship:
• When one variable has an effect on another variable
You may also be asked a question similar to this in the section 2 exam• Use Case Study 4 to answer the question.• What is the relationship between X and
Y?• Explain how well the information in Case
Study 4 supports your answer.3 marks
The content of the question and mark scheme will vary depending on the ISA.
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1 There is a statement that the higher the specific heat capacity the smaller the temperature rise produced in the substance
2There is a statement that the higher the specific heat capacity the smaller the
temperature rise produced in the substance and some data is quoted to support this
3
There is a statement that the higher the specific heat capacity the smaller the temperature rise produced in the substance and some data is quoted to
support thisThere is a realisation that any discerned relationship can only be an
approximation using the data in the table, as the data contains some anomalies
Explain;• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Valid conclusion:
• A conclusion supported by valid data, obtained from an appropriate experimental design and based on sound reasoning.
You may also be asked a question similar to this in the section 2 exam• Look at Case Study 4. • A X who saw the results advised …• Do you agree with this advice? • Explain your answer.
3 marksThe context of the question and mark scheme will vary depending on the ISA.
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1 A comment is made as to whether the advice is supported or notThere is a simple statement that uses information from the graph to support the comment
2A comment is made as to whether the advice is supported or not
There is a statement that uses information from the graph to support the commentA clear advantage of using “Ger-off” or a clear disadvantage of using “Ger-off” is stated
3A comment is made as to whether the advice is supported or not
There is a statement that uses informationfrom the graph to support the comment
A clear advantage of using “Ger-off” and a clear disadvantage of using “Ger-off” is stated
Explain;• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Hypothesis:
• A proposal intended to explain certain facts or observations
You may be asked a question similar to this in the section 2 exam:• Look at Case Study 4. • To what extent do the
results support the hypothesis you were given?
3 marksThe context of the mark scheme will vary depending on the ISA.
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1 Increasing the mass of aggregate increases the force needed to break the beam initially, but the strength then declines as more aggregate is added.
2
Increasing the mass of aggregate increases the force needed to break the beam initially, but the strength then declines as more aggregate is added.
The maximum strength of the beam is quoted.OR
A comment is made regarding the difference in gradient of the graph before and after the peak.
3
Increasing the mass of aggregate increases the force needed to break the beam initially, but the strength then declines as more aggregate is added.
The maximum strength of the beam is quoted.AND
A comment is made regarding the difference in gradient of the graph before and after the peak.
Explain:• You should make something clear, or state the reasons for something happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Context:
• Your teacher will describe the context in which the investigation is set.
Relating the investigation to the context
• Your teacher will describe the context in which the investigation is set.
• You must research this context and write down how the results of your investigation might be useful, e.g. health and safety developments, energy efficiency, in industry, etc.
7 • ISA section 2 exam – Science A
You may be asked a question similar to this in the section 2 exam:• How could the results from your investigation be useful
in the context that you have researched? • You may use information from your Candidate Research
Notes to help you to answer this question. 3 marks
Marks Guidance
0 No credit worthy response
1 An idea from the research has been related to the context
2An idea from the research has been related to the
context and there is a simple explanation of how the idea can be applied and used in the given context
3An idea from the research has been related to the
context and there is a detailed explanation of how this idea can be applied in the given context
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
An example of a good answer
An example of a poor answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a graph or bar chart:• You will be required to draw a graph or bar chart of your
results
7 • ISA section 2 exam – Science A
Marks Answer Additional guidance
1X axis: suitable
scales chosen and labelled with
quantity and units.
Scale should be such that the plots occupy at least one third of each axis.
Accept axes reversed.
1Y axis: suitable
scales chosen and labelled with
quantity and units.
It may not always be necessary to show the origin.
1Points or bars
plotted correctly to within ± 1 mm.
Allow one plotting error out of each 5 points/bars plotted.
1Suitable line drawn
on graph or bars correctly labelled on
bar chart.
Allow error carried forward from incorrect points.If wrong type of graph / chart, maximum 3 marks.If the independent variable is:• categoric, a bar chart should be drawn• continuous, a best fit line should be
drawnN.B. If no line is possible because there is no correlation, candidates should state this on the graph to gain the mark
Depe
nden
t var
iabl
e (u
nits
)
Independent variable (units)
Title:• This should describe what your graph shows
Line of best fit:• This goes roughly through the middle of all the scatter
points on a graph. The closer the points are to the line of best fit the stronger we can say the correlation is.
• It can be a curve.
Anomalous results:• Put a ring round any outliers to show you know they do
not if the pattern.
Jagged line:• These indicate a broken scale. A broken scale is used
when values close to 0 are not required.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Science A
All these graphs scored full marks
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
Section 2 Exam:• Up to 50 minutes is allowed for this. • The test may be taken in the normal teaching room,
provided that you can be accommodated in such a way as to prevent any copying or unauthorised collaboration. However the test will usually take place in the hall, dance studio or drama studio depending on their availability.
• If you normally have a reader, extra time, scribe etc. for exams then you will have the same arrangements made for the ISA exam.
• Section 1 of the ISA will contain questions concerning conclusions and evaluation and is worth 30 marks of the overall 50 allocated to the Controlled Assessment.
• You may use your Candidate Research notes sheet, which you filled in during your research.
• You will also be given a data sheet with 4 case studies.
Section 2 Exam:There are normally 4 questions, some of these questions are made up of more than one part:1.Analyse and evaluate your results
a) Do your results support your hypothesis?b) - e) These questions are on a variety of topics
and may vary in number from ISA to ISA
2.Analyse and evaluate the data given in the case studiesa) Sketch graphb) Explain whether or not the results on the Secondary
data sheet support the given hypothesisc) Analysis of Case Study 4
This is only a guide there may be more questions based on the case studies
3.How could the results from your investigation be useful in the context that you have researched?
3 marks4.Submit the graph or bar chart you have drawn of your results
4 marks
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may also be asked a question similar to this in the section 2 exam• Do your results support the
hypothesis that you investigated?
• You should use any pattern that you can see in you results to support your answer.
• You should include examples from your results
3 marks
7 • ISA section 2 exam – Additional / Separate Science
Marks Guidance
0 No credit worthy response
1 A simple correct statement is made as to whether or not the results support the hypothesis with an attempt at an explanation
2A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a simple description of a correctly
identified pattern or lack of pattern
3A simple correct statement is made as to whether or not the results support the hypothesis and an explanation that includes a detailed description of a correctly
identified pattern or lack of pattern.
Hypothesis:• A proposal intended to explain
certain facts or observations
Explain:• You should make something clear, or state the reasons for something happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Anomalous:
• A result that does not fit into a common, familiar, or expected type or pattern
You may be asked a question similar to this in the section 2 exam:• Did you get any anomalous
results? • Explain your answer. • Your explanation should
include examples from your results.
3 marks
7 • ISA section 2 exam – Additional / Separate Science
Explain:• You should make something clear, or state the reasons for something happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1 There is a correct statement as to whether or not there are any anomalous results
2 There is a correct statement as to whether or not there are any anomalous results and a statement or implication that anomalous results are ones that do not fit the pattern.
3
There is a correct statement as to whether or not there are any anomalous results and a statement or implication that anomalous results are ones that do not fit the pattern.
Some examples from the results are given to support this, eg by specifying results that are considered to be anomalous or by referring to the fact that, eg all results are very close to a
line of best fit.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 2 exam:• Reproducibility is important in
experiments. • Do you think that your results are
reproducible by other people? • Use examples from your results to explain
the reason for your answer. 3 marks
7 • ISA section 2 exam – Additional / Separate Science
Reproducible:• A measurement is reproducible if the
investigation is repeated by another person, or by using equipment or techniques, and the same results are obtained.
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1 A statement is made as to whether or not the results are likely to be reproducible, with a reason stated.
2 A statement is made as to whether or not the results are likely to be reproducible, with a reason stated and an explanation is given.
3A statement is made as to whether or not the results are likely to be
reproducible, with a reason stated and an explanation is given. There is a detailed explanation supported by at least one example from
the results .
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 2 exam:• Describe in detail how you could use
repeated readings to obtain more accurate results.
3 marks
7 • ISA section 2 exam – Additional / Separate Science
Repeatable:• A measurement is repeatable if the
original experimenter repeats the investigation using the same method and obtains the same results.
Explain:• You should recall some facts, events or process in an accurate way - for
example an experiment you have done. • You may need to give an account of what something looked like, or what
happened, eg a trend in some data.
Accuracy:• A measurement result is considered
accurate if it is judged to be close to the true value.
Marks Guidance
0 No credit worthy response
1 A statement is made that a mean should be calculated.
2 A statement is made that a mean should be calculated by adding the results together and dividing by the number of values.
3
A statement is made that a mean should be calculated, by adding the results together and dividing by the number of values.
A statement is made that either anomalous results are discarded before calculating a mean or a graph is plotted and a best fit line is drawn
ignoring anomalous points
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Range:
• The maximum and minimum values of the independent or dependent variables; important in ensuring that any pattern is detected.
You may be asked a question similar to this in the section 2 exam:What was the independent variable in the investigation that you did? What was the range of the independent variable? The range was from ……… to ………Explain why this was or was not a suitable range.
3 marks
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1At least one end of the range is correctly stated
Another value of the independent variable is suggested, although it may not be appropriate
2The range is correctly stated, according to the candidate’s own resultsAnother appropriate value of the independent variable is suggested
The reason for the additional value is unclear or inappropriate
3The range is correctly stated, according to the candidate’s own resultsAnother appropriate value of the independent variable is suggested
The reason for the additional value is clear and appropriate
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a poor answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Resolution:
• This is the smallest change in quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading.
You may be asked a question similar to this in the section 2 exam:• Resolution refers to the smallest scale division of a
measuring instrument. • What was the resolution of the device that you used to
measure the timing of the reaction? • Do you think that this resolution was appropriate for this
measurement? • Explain your answer.
3 marks
7 • ISA section 2 exam – Additional / Separate Science
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1A correct value for the resolution is given
ORA sensible but incorrect value is given for the resolution, with a
correct statement appropriate to the resolution they have given.
2A correct value for the resolution is given
ANDA correct statement as to whether or not the resolution was
appropriate is given, but the explanation is not clear
3A correct value for the resolution is given
ANDA correct statement as to whether or not the resolution was
appropriate is given with a clear explanation
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 2 exam:Most investigations contain errors or uncertainties. What do you think was the cause of the largest error or uncertainty in your investigation? What you could do to reduce the size of this error if you were to repeat the investigation? Explain your answer.
3 marks
7 • ISA section 2 exam – Additional / Separate Science
Uncertainty:• The interval within which the true value
can be expected to lie, within a given level of confidence or probability.
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1 There is a statement as to the possible cause of the largest error.
2There is a statement as to the possible cause of the largest error.
An appropriate suggestion is made regarding how the size of this error might be reduced.
3There is a statement as to the possible cause of the largest error.
An appropriate suggestion is made regarding how the size of this error might be reduced. together with an explanation regarding how the
suggestion might lead to a reduction in the size of the error.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may be asked a question similar to this in the section 2 exam:• You have been given a Secondary Data Sheet that
provides results from similar investigations. • Draw a sketch graph of the results in Case Study 1.
3 marks
7 • ISA section 2 exam – Additional / Separate Science
Sketch graph:• A line graph, not necessarily on a grid, that shows the
general shape of the relationship between two variables. It will not have any points plotted and although the axes should be labelled they may not be scaled.
Explain:• You should make something clear, or state the reasons
for something happening.• The points in the answer must be linked coherently and
logically.• The answer should not be a simple list of reasons.
Marks Guidance
0 No credit worthy response
1 Both axes labelled with the variables and units
2 Both axes labelled with the variables and units and an appropriate line drawn
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of a good answer
An example of a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
You may also be asked a question similar to this in the section 2 exam• X investigates the following hypothesis …• Explain whether or not the results in Case
Studies 1, 2 and 3 support this hypothesis.• To gain full marks your explanation should
include appropriate examples from the results in Case studies 1, 2 and 3.
3 marks
7 • ISA section 2 exam – Additional / Separate Science
Marks Guidance
0 No credit worthy response
1 A simple correct statement is made about at least two of the Case Studies 1, 2 and 3, as to whether or not they support the hypothesis.
2 Correct statements are made Case Studies 1, 2 and 3, supported by a more detailed explanation of one of them.
3 Correct statements are made Case Studies 1, 2 and 3, supported by a more detailed explanation of both Case Studies 2 and 3.
Hypothesis:• A proposal intended to explain certain
facts or observations
Explain:• You should make something clear, or state the reasons for something
happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Hypothesis:
• A proposal intended to explain certain facts or observations
You may be asked a question similar to this in the section 2 exam:• Look at Case Study 4. • To what extent do the
results shown support the manufacturer's hypothesis?
• Explain your answer. 3 marks
7 • ISA section 2 exam – Science A
Marks Guidance
0 No credit worthy response
1There is a simple statement saying whether or not the results in Case study 4 support the manufacturer's hypothesis and this is supported by some qualitative information
quoted.
2There is a simple statement saying whether or not the results in Case study 4 support
the manufacturer's hypothesis and this is supported by some quantitative information quoted.
3
There is a simple statement saying whether or not the results in Case study 4 support the manufacturer's hypothesis and this is supported by some quantitative information
quoted. There is also a statement that makes clear the limitations of the data in supporting the
hypothesis.
Explain:• You should make something clear, or state the reasons for something happening.• The points in the answer must be linked coherently and logically.• The answer should not be a simple list of reasons.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of
a good answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Context:
• Your teacher will describe the context in which the investigation is set.
Relating the investigation to the context
• Your teacher will describe the context in which the investigation is set.
• You must research this context and write down how the results of your investigation might be useful, e.g. health and safety developments, energy efficiency, in industry, etc.
7 • ISA section 2 exam – Additional / Separate Science
You may be asked a question similar to this in the section 2 exam:• How could the results from your investigation be useful
in the context that you have researched? • You may use information from your Candidate Research
Notes to help you to answer this question. 3 marks
Marks Guidance
0 No credit worthy response
1 An idea from the research has been related to the context
2An idea from the research has been related to the
context and there is a simple explanation of how the idea can be applied and used in the given context
3An idea from the research has been related to the
context and there is a detailed explanation of how this idea can be applied in the given context
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
An example of a good answer
An example of a poor answer
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
Producing a graph or bar chart:• You will be required to draw a graph or bar chart of your
results
7 • ISA section 2 exam – Additional / Separate Science
Marks Answer Additional guidance
1X axis: suitable
scales chosen and labelled with
quantity and units.
Scale should be such that the plots occupy at least one third of each axis.
Accept axes reversed.
1Y axis: suitable
scales chosen and labelled with
quantity and units.
It may not always be necessary to show the origin.
1Points or bars
plotted correctly to within ± 1 mm.
Allow one plotting error out of each 5 points/bars plotted.
1Suitable line drawn
on graph or bars correctly labelled on
bar chart.
Allow error carried forward from incorrect points.If wrong type of graph / chart, maximum 3 marks.If the independent variable is:• categoric, a bar chart should be drawn• continuous, a best fit line should be
drawnN.B. If no line is possible because there is no correlation, candidates should state this on the graph to gain the mark
Depe
nden
t var
iabl
e (u
nits
)
Independent variable (units)
Title:• This should describe what your graph shows
Line of best fit:• This goes roughly through the middle of all the scatter
points on a graph. The closer the points are to the line of best fit the stronger we can say the correlation is.
• It can be a curve.
Anomalous results:• Put a ring round any outliers to show you know they do
not if the pattern.
Jagged line:• These indicate a broken scale. A broken scale is used
when values close to 0 are not required.
Controlled Assessment Unit - CAUInvestigative Skills Assessment - ISA
7 • ISA section 2 exam – Additional / Separate Science
All these graphs scored full marks