A student investigated the density of different fruits.
Table 1 shows the results
i- The student determined the volume of each fruit using a displacement can and a measuring cylinder.
What other piece of equipment would the student need to determine the density of each fruit?
[1 mark]
ANSWER
Balance or scale (for measuring the mass).
ii- Write down the equation which links density (ρ), mass (m) and volume (V).
[1 mark]
ANSWER
iii- The mass of the apple was 85 g.
The density of the apple was 0.68 g/cm3.
Calculate the volume of the apple.
Give your answer in cm3.
[3 marks]
SOLUTION
There isn’t a need to convert mass from g to kg as the density given in the question is also g/cm3.
iv- The student only measured the volume of each fruit once.
The volume measurements cannot be used to show that the method to measure volume gives precise readings.
Give the reason why.
[1 mark]
ANSWER
To show that the readings are close together, the student needs to repeat the readings for each fruit.
(Rightnow, we can’t say that student has precise reading as the student has only measured volume once for each fruit. )
