6PH03 Exemplar Material - Script 2

8/12/2019 6PH03 Exemplar Material - Script 2

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Exemplar Script 2


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GCE Physics 2008 marking grids AS Script 2A: 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 Three types of sources used, books, magazine, internet.

S2 States details of visit venue OR providesfull details of sources of information

0 Details of sources given, but no date given for web access.

S3 Provides a brief description of the visitOR case study

1 It is clear how projectile motion is related to sport

S4 Makes correct statement on relevant

physics principles

1 Appropriate equations of motion used

S5 Uses relevant specialist terminologycorrectly

0 Confusion of horizontal and vertical in some places andnot clear that the force of gravity is always acting

S6 Provides one piece of relevantinformation (eg data, graph, diagram)that is not mentioned in the briefingpapers for the visit or case study

1 Several good illustrations of projectile motion

S7 Briefly discusses context (egsocial/environmental/historical)

1 Study of projectiles related to sports activities (social)

S8 Comments on implication of physics (egbenefits/risks)

0 Benefits or risks not discussed

S9 Explains how the practical relates to thevisit or case study

1 Clear that horizontal and vertical motion are going to bestudied in the practical

Total marks for this section6

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 horizontal distance

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 1 mm precision of metre rule sufficient for this experiment.

P4 States how to measure a second relevantquantity using the most appropriateinstrument

0 No other instrument discussed. Mark could have beenscored if the candidate had talked about measuring thevertical height on the ramp with the metre rule

P5 Explains the choice of the secondmeasuring instrument with reference tothe scale of the instrument asappropriate and/or the number ofmeasurements to be taken

0 No other instrument discussed

P6 Demonstrates knowledge of correctmeasuring techniques

0 No special experimental techniques employed


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P7 States which is the independent andwhich is the dependent variable

1 Dependent and independent variables are identified

P8 Identifies and states how to control allother relevant variables to make it a fairtest

1 Keeping the angle of the ramp and the mass of the ballconstant are reasonable suggestions, even though intheory they should not make any difference

P9 Comments on whether repeat readingsare appropriate in this case

1 Average horizontal distance found to eliminate errors andanomalous results

P10 Comments on safety 0 Safety should be related to avoiding the possibility of theball rolling around the floor.

P11 Discusses how the data collected will beused

1 Excellent section on the use of data

P12 Identifies the main sources ofuncertainty and/or systematic error

1 Friction and air resistance discussed

P13 Draws an appropriately labelled diagramof the apparatus to be used

1 Reasonable diagram of the apparatus

P14 Plan is well organised and methodical,using an appropriately sequenced step-by-step procedure

0 Procedure not clear.

Total marks for this section 9

C: Implementation and Measurements


M1 Records all measurements using thecorrect number of significant figures,tabulating measurements where

appropriate

0 Vertical height measured to the nearest cm not to thenearest mm

M2 Uses correct units throughout 1 Correct units throughoutM3 Obtains an appropriate number of

measurements1 8 different values of release height is more than sufficient.

Minimum of 6 values is required.M4 Obtains measurements over an

appropriate range0 The greatest horizontal displacement was 0.44 m. This

could have been larger, particularly as a metre rule wasused for the measurement.



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D: Analysis


A1 Produces a graph with appropriatelylabelled axes and with correct units

1 Axes labelled and units

A2 Produces a graph with sensible scales 0 On the main graph, the data for the horizontaldisplacement only occupies 9 cm. This scale could havebeen doubled as there are 21 cm below the top graph.

A3 Plots points accurately 0 The point corresponding to 0.63 m/s has been misplottedA4 Draws line of best fit (either a straight

line or a smooth curve)1 Best fit and worst fit straight lines drawn

A5 Comments on the trend/patternobtained

0 The comment on the graph is confusing because thecandidate refers to the horizontal displacement and theacceleration

A6 Derives relation between two variables

or determines constant1 The calculation of the gradient of the graph is correct and

is shown on the graph paperA7 Discusses/uses related physics principles 1 Good discussion of the physics in the planA8 Attempts to qualitatively consider

sources of error1 Air resistance and friction discussed.

A9 Suggests realistic modifications to reduceerror/improve experiment

0 To improve the experiment, greater distances need to bemeasured. Hence sphere needs to be released fromhigher points on the ramp. Repeat results were in the plan

A10 Calculates uncertainties 1 Percentage uncertainty determined from the gradients ofthe out-lying lines.

A11 Provides a final conclusion 1 Correct conclusion regarding the direct proportionalitybetween the horizontal velocity and horizontaldisplacement. Also gradient of graph = time of 0.36 s.



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E: Report

Additional comment

This is a difficult experiment with several stages which might disadvantage weaker candidates.


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.


Total marks for this unit 26


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6PH03 Exemplar Material - Script 2