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In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below.

      

In an experiment, disinfected soaked bean seeds were put in a vacuum flask which was then fitted with a thermometer as shown in the diagram below.
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The temperature reading were taken every morning for three consecutive days
(a) Which process was being investigated?
(b) Why were the seeds disinfected?
(c) Why was a vacuum flask used in the set-up?
(d) How would a control for this experiment be set?

  

Answers


John
a) Respiration or aerobic respiration

b) To kill bacteria/ fungi/ micro-organisms that would cause decay/ decomposition or respiration of the micro-organisms which could raise heat

c) To conserve heat/ prevent heat loss to surrounding

d) Use a similar set-up with dead disinfected boiled seeds or use dry bean seeds
johnmulu answered the question on May 4, 2017 at 11:58


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