Exemplar for Internal Assessment Resource Physics Level 1

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1 Exemplar for internal assessment resource 1.1B Physics for Achievement Standard Exemplar for Internal Assessment Resource Physics Level 1 This exemplar supports assessment against: Achievement Standard Carry out a practical physics investigation that leads to a linear mathematical relationship, with direction Student and grade boundary specific exemplar The material has been gathered from student material specific to an A or B assessment resource. Date version published by Ministry of Education December 2011 To support internal assessment from 2012 Crown 2011

2 Exemplar for internal assessment resource 1.1B Physics for Achievement Standard Grade Boundary: Low Excellence At the Excellence level the students are required to carry out a comprehensive practical physics investigation, with direction, that leads to a linear mathematical relationship. Carrying out a comprehensive practical physics investigation involves writing a discussion that validates the conclusion. The discussion may include, as appropriate: a justification for the accuracy-improving techniques used a reason that there is a limit to either end of the value chosen for the independent variable a justification why a variable needs to be controlled a description of any difficulties encountered when making measurements and how these difficulties were overcome a link between investigation findings and applicable physics ideas a description of any unexpected outcomes of the processing of the results and a suggestion of how these outcomes could have been caused and/or the effect they had on the validity of the conclusion. The control variables have been discussed and the importance of using the same ball has been justified, they have discussed the possibility that other rubbers may give different rebound heights however this was not investigated in the experiment. Accuracy-improving techniques have been used and justified. A confused attempt has been made at providing a reason for a limit to the values chosen for the independent variable. An attempt at a description of any difficulties and the solution to these has been made but the justification does add to the work at the excellence level. To achieve the standard at the Excellence level more securely the student could include the following: reason for a limit to the values chosen for the independent variable a description of any difficulties and the solution to these a comment on the validity of the conclusion. Crown 2011

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6 Exemplar for internal assessment resource 1.1B Physics for Achievement Standard Grade Boundary: High Merit At the Merit level the students are required to carry out an in-depth practical physics investigation, with direction, that leads to a linear mathematical relationship. Carrying out an in-depth practical physics investigation involves: controlling the variable(s) that could have a significant effect on the results using technique(s) that increase the accuracy of the measured values of the dependent (and independent, if appropriate) variable drawing a linear graph, valid for the data writing a conclusion that states the equation of the relationship. The link has been given between the findings of the investigation and the energy transformation from GPE to KE. The reliability of the results has not been fully discussed and the validity has only been very briefly mentioned. To achieve the standard at the Excellence level the student could include the following: a justification for the use of the accuracy improving techniques. a reason for the limits of the independent variable. a justification for why the variables should be controlled. a description of any difficulties and the solution to these a comment on the validity of the conclusion. Crown 2011

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9 Exemplar for internal assessment resource 1.1B Physics for Achievement Standard Grade Boundary: Low Merit The control variables have been listed and techniques that increase accuracy, including repeating and averaging have been used whilst recording the data. The points on the graph are not all plotted accurately for the averaged value of the force. The gradient of the line has been calculated and the equation of the relationship has been stated in the conclusion. To achieve the standard at the Merit level more securely the student could include a linear graph, valid for the data. Crown 2011

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13 Exemplar for internal assessment resource 1.1B Physics for Achievement Standard Grade Boundary: High Achieved At the achieved level the students are required to: Carry out a practical physics investigation, with direction, that leads to a linear mathematical relationship. Carry out a practical physics investigation involves: developing a method for collecting the data, collecting primary data, with units, relevant to the purpose, based on the manipulation of the independent variable over a reasonable range and number of values, drawing a graph, based on the data, writing a conclusion that links the processed data to the identified trend on the graph. The control variables which could have an effect on the results have been included. The use of repeating and averaging can be seen and parallax error has been considered. A linear graph has been drawn, however the force values for the masses 0.3 and 0.4 have not been plotted accurately and line of best fit has been forced through the origin and so does not fully reflect the data. The line should show an intercept which indicates a systematic error. The gradient has been calculated for the line of best fit and the correct equation has been given but has then been rearranged incorrectly. To achieve the standard at the Merit level the student could include the following: a linear graph, valid for the data a correctly stated equation for the relationship. Crown 2011

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17 Exemplar for internal assessment resource 1.1B Physics for Achievement Standard Grade Boundary: Low Achieved The method has been developed which enables the data to be collected. Relevant data has been collected and has been stated with the appropriate units. The conclusion linking the data to the identified trend on the graph is given. A linear graph has been given for the data collected, the line of best fit is low as all the points not on the line are above it. The gradient calculation has been attempted but not given correctly. The use of repeating and averaging is evident. To achieve the standard more securely the student could include a slightly wider range and number of data points in the data collection, and a conclusion that is more clearly written in terms of the variables. Crown 2011

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20 Exemplar for internal assessment resource 1.1B Physics for Achievement Standard Grade Boundary: High Not Achieved The method has been developed which enables the data to be collected. Relevant data has been collected over a reasonable range of values and has been stated with the appropriate units. A linear graph based on the data has been drawn and labelled. A gradient calculation has been attempted although the value is incorrect. The accuracy improving technique of repeating and averaging has been used and described. To achieve the standard the student could include the following a conclusion linking the processed data to the identified trend on the graph. Crown 2011

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