Luke recorded his results in a table as shown below.
beaker
volume of water,
in cm3
temperature at start, in °c
temperature after
2 minutes, in °c
a
25
18
30
b
50
18
24
c
75
18
22
(a) why did luke need to know the temperature of the water at the beginning and at the end of the experiment?


1 mark
(b) did luke’s results support his prediction? explain your answer.


1 mark

(c) luke stirred the water during the experiment. how did this make his results more reliable?