unit 5 2024, practical mark scheme

Question 1

8 marks for a method

Answer 1

trial readings
state what graph to draw
repeat readings and suitable range
method (when to start stopwatch, where to record height)
risk assessment
log conversion
labelled diagram
method to reduce uncertainty (eg. record 20 oscillations)

Question 2

5 marks for a table

Answer 2

headings and units
5 readings with repeats
mean correct
logs/ uncertainties correct
resolution

Question 3

5 marks for a graph

Answer 3

Titles and Axis units correct
suitable scale, 1/2 of graph used, no awkward factors
points plotted correctly
line of best fit, or min and max
error bars plotted correctly

Question 4

3 marks for gradient

Answer 4

n=gradient (correctly from formula)
large triangle
correct calculation