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GCE Physics 2008 marking grids AS Script 5A: Summary of case study or physics-based visitCriterion Mark
Ref Criterion Mark Comment
S1 Carries out a visit OR uses library,consulting a minimum of three differentsources of information (egbooks/websites/journals/magazines/casestudy provided byEdexcel/manufacturers data sheets)
1 Visit carried out
S2 States details of visit venue OR providesfull details of sources of information
1 Visited Cummins Turbo Technologies in Huddersfield
S3 Provides a brief description of the visitOR case study
1 Tour of the factory including seeing the test procedures
S4 Makes correct statement on relevant
physics principles
1 Stress and Strain defined at the end of the report
S5 Uses relevant specialist terminologycorrectly
1 Technical language has been used correctly throughoutthe report
S6 Provides one piece of relevantinformation (eg data, graph, diagram)that is not mentioned in the briefingpapers for the visit or case study
1 Tension test from Turbo Technologies included
S7 Briefly discusses context (egsocial/environmental/historical)
1 Reduction in the environmental impact of exhaust gasesand emissions
S8 Comments on implication of physics (egbenefits/risks)
1 Turbo charger allows more power to be produced from theengine
S9 Explains how the practical relates to thevisit or case study
1 The Young modulus of nylon fishing line to be tested
Total marks for this section 9
B: Planning
Ref Criterion Mark Comment
P1 Lists all materials required 1 List of apparatus givenP2 States how to measure one relevant
quantity using the most appropriateinstrument
1 Metre rule to measure extension
P3 Explains the choice of the measuringinstrument with reference to the scale ofthe instrument as appropriate and/or thenumber of measurements to be taken
1 Precision of metre rule stated as 1 mm
P4 States how to measure a second relevantquantity using the most appropriateinstrument
1 Micrometer to measure diameter
P5 Explains the choice of the secondmeasuring instrument with reference tothe scale of the instrument asappropriate and/or the number ofmeasurements to be taken
1 Precision of micrometer stated as 0.01 mm
P6 Demonstrates knowledge of correctmeasuring techniques
1 Plenty of good measuring techniques, diameter recordedat different positions and orientations, zero error check
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P7 States which is the independent and
which is the dependent variable1 Mass is identified as the independent variable and
extension as the dependent variableP8 Identifies and states how to control all
other relevant variables to make it a fairtest
0 The types of masses used is not really a variable to be
controlled
P9 Comments on whether repeat readingsare appropriate in this case
1 The reliability of results is improved by taking severalmeasurements of the diameter
P10 Comments on safety 1 Safety goggles to protect eyes usedP11 Discusses how the data collected will be
used0 If strain against stress plotted then the gradient will be 1 /
(Young Modulus)P12 Identifies the main sources of
uncertainty and/or systematic error1 Several sources of uncertainty are discussed.
P13 Draws an appropriately labelled diagramof the apparatus to be used
1 Good diagram of the apparatus
P14 Plan is well organised and methodical,using an appropriately sequenced step-
by-step procedure
1 Good sequenced step by step procedure.
Total marks for this section 12
C: Implementation and Measurements
Ref Criterion Mark Comment
M1 Records all measurements using thecorrect number of significant figures,tabulating measurements whereappropriate
0 Significant figures not appropriate original length valueand the force seems to have been calculated using g = 10N/kg but is given to 2sf
M2 Uses correct units throughout 1 Correct units used throughout
M3 Obtains an appropriate number ofmeasurements
1 20 different values of force is more than sufficient.Minimum of 6 values is required.
M4 Obtains measurements over anappropriate range
1 Range of mass is appropriate, with a maximum mass of1.0 kg
Total marks for this section 3
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D: Analysis
E: Report
Ref Criterion Mark Comment
A1 Produces a graph with appropriatelylabelled axes and with correct units
1 Axes labelled and units
A2 Produces a graph with sensible scales 1 Data occupies more than half the page in each directionA3 Plots points accurately 1 Plotted points checked are correct within 1 mmA4 Draws line of best fit (either a straight
line or a smooth curve)1 The line of best fit is appropriate for these results
A5 Comments on the trend/patternobtained
0 Stated the shape of the graph but no real comments aboutthe shape
A6 Derives relation between two variablesor determines constant
1 Perfect calculation of the gradient of the graph
A7 Discusses/uses related physics principles 0 The error in P11 has not really been corrected here, so nomark.
A8 Attempts to qualitatively consider
sources of error1 The suggestions made for the sources of error are
reasonableA9 Suggests realistic modifications to reduce
error/improve experiment1 Keeping a check on the diameter to get a more accurate
stress value is a reasonable improvementA10 Calculates uncertainties 1 Correct calculations for percentage uncertainty for both
the diameter and the extensionA11 Provides a final conclusion 1 The young Modulus of Nylon has been found
Total marks for this section 9
Ref Criterion Mark
R1 Summary contains few grammatical orspelling errors
1 Summary has correct grammar and spelling
R2 Summary is structured using appropriatesubheadings
1 Subheadings are given in the summary. Both marksscored even though the document has not been wordprocessed.
Total marks for this section 2
Total marks for this unit 35
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