6PH03 Exemplar Material - Script 5

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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


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.


C: Implementation and Measurements


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



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D: Analysis

E: Report


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


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 unit 35


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6PH03 Exemplar Material - Script 5

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