This lesson explains how to prepare for Paper 6, the Alternative to Practical exam. It is worth 20% of the total mark.
Paper 6 structure
The paper is 1 hour long and worth 40 marks. It contains two or three questions, each based on a different experiment.
What Paper 6 tests
Paper 6 does not test physics content directly. It tests practical skills:
- Taking and recording measurements
- Plotting graphs from data
- Drawing conclusions from graphs
- Planning experiments
- Evaluating experimental procedures
Skill 1: Recording data
Record all measurements to the precision of the instrument. For example, a ruler reading should be to the nearest mm (e.g., 23.5 cm, not 24 cm). Use consistent decimal places throughout a column.
Skill 2: Tables
Draw tables with ruled borders. Column headings must include the quantity and the unit, separated by a slash (e.g., Length / cm). Raw data goes in one column; calculated values in another.
Skill 3: Graphs
Choose a scale that uses at least half the grid. Label axes with quantity and unit. Plot points accurately. Draw a best-fit line. Calculate the gradient using two points far apart on the line (not data points).
Skill 4: Drawing conclusions
State what the graph shows: “The graph shows that current is directly proportional to voltage, because the best-fit line is a straight line through the origin.”
Skill 5: Evaluating
Identify weaknesses in the experiment. Suggest realistic improvements. Examples: “The spring might not return to its original length, so an elastic limit check should be done.” “Using more data points would improve the reliability of the best-fit line.”
Practice strategy
Do at least 6 Paper 6 past papers. Focus on graph plotting (marks are lost for poor scales and inaccurate plotting) and data recording (marks are lost for wrong precision).
Need a Plan Based on Actual Work?
A private taught trial can help distinguish whether the repeated difficulty is mainly Physics knowledge, Mathematics, practical reasoning or exam technique before regular lessons are discussed.