Physics Boys' Secondary Mosta Half-Yearly Examinations Form 3 - Kullegg Maria Regina, 2015-2016 Page 10
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108. This question is about the density.
Stefan needs to find the density of cooking oil. First he measures the mass of an
empty beaker. Then he fills it with oil and measures the mass once again.
a) (i) The instrument to measure the mass of the oil is called ________________________ . [1]
He obtains the following readings:
Mass of empty beaker
120 g
Mass of beaker filled with oil
200 g
(ii) The mass of oil used = ___________ g
[1]
(iii) He then pours the oil in the apparatus shown in Figure 7.
Name this apparatus.
_________________________________________________________ [1]
Figure 7
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(iv) The volume of the oil = __________ cm
.
[1]
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(v) Using your answers in a) (ii) and a) iv), calculate the density of oil in g/cm
.
[2]
______________________________________________________________________________
b) Jodie finds a shiny solid metal block. She wants to know what material it is made of by
measuring its density. The dimensions of the block are shown below.
4 cm
2 cm
8 cm
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(i) Calculate the volume of the block in cm
.
[1]
______________________________________________________________________________
(ii) Given that the block has a mass of 506 g, calculate its density.
[3]
______________________________________________________________________________
(iii) Jodie compares the result obtained with the densities found in a Physics textbook.
Aluminium = 2.7 g/cm
Silver = 10.5 g/cm
Iron = 7.9 g/cm
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What material is the block made of? _________________________________________
[2]
(iv) Underline the correct answer.
If the block is placed in water, it would (float, sink) as its density is (smaller, greater) than that of
water. A smaller block made of the same material would have (a different, the same) density.
[3]
Page 10 of 10
Physics Half yearly exam 2016– Track 2 - Form 3
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