a) The objective of the experiment is to observe and compare the temperature changes in the two vacuum flasks containing boiled maize grains and living maize grains, to investigate the metabolic activity of living organisms.
b) After 24 hours, the student observed that the temperature in the vacuum flask containing living maize grains was higher than the temperature in the vacuum flask containing boiled maize grains.
c) The higher temperature in the vacuum flask containing living maize grains indicates that the living maize grains are undergoing metabolic processes, such as respiration, which generate heat. This metabolic activity is not present in the boiled maize grains, which do not have living cells capable of carrying out such processes.
d) Vacuum flasks were likely used in this experiment to prevent heat exchange with the surroundings, thereby isolating the maize grains and allowing for accurate temperature measurements.
e) To make the results more reliable, the student could replicate the experiment multiple times to ensure consistency in the observations. Additionally, using a control group with no maize grains (just air) could help to account for any external factors influencing the temperature changes.
1)A student set up an experiment in two vacuum flasks,one containing boiled maize grains and the other living maize grains.Thestudent then inserted a thermometer inside the two vacuum flasks and covered the ends with cotton wool.
a)State the objective of the experiment
b)State the observations made in each flask after 24 hours
c)Account for the observations in ( b) above
d)Suggest why the vacuum flask were used in this experiment
e)What alteration would you make in the setup to make the results more reliable
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