.
Bethan carries out an experiment with a burning candle. Bethan places a burning candle under a beaker and times how long it takes to go out. She then repeats the experiment with different amounts of oxygen.
Her results are shown below:-
Amount of Oxygen (cm
3
)
Time taken for candle to go out
(seconds)
10
15
30
45
60
90
100
150
150
225
200
300
(a)
draw a line graph of Bethan’s results
. Marks will be awarded for labelled axis, a good scale, a line of best fit and a title. (5 marks)
(b) What is the independent variable in this experiment?
_________________________________________ (1 mark)
(c) What is the dependent variable in this experiment?
_________________________________________ (1 mark)
(d) Write a conclusion for the experiment. (1 mark)
_____________________________________________________________
_____________________________________________________________

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