CAIE IGCSE Physics 1.4 Density Topic Practice

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Covered syllabus points

1.4.1—Density as mass per unit volume1.4.2—To determine the density of a liquid1.4.3—Whether an object floats based on1.4.4—Whether one liquid will float on

Question 1

[Maximum number: 1]

The diagram shows some liquid in a measuring cylinder.
The mass of the liquid is 16 g .

Figure for Question 1 — CAIE IGCSE Physics

What is the density of the liquid?

A

0.80 g/cm30.80 \mathrm{~g} / \mathrm{cm}^{3}

B

1.3 g/cm31.3 \mathrm{~g} / \mathrm{cm}^{3}

C

36 g/cm336 \mathrm{~g} / \mathrm{cm}^{3}

D

320 g/cm3320 \mathrm{~g} / \mathrm{cm}^{3}

Question 2

[Maximum number: 7]

Question (a)

(a)

Oil of density 0.80 g/cm30.80 \mathrm{~g} / \mathrm{cm}^{3} is poured gently onto the surface of water of density 1.0 g/cm31.0 \mathrm{~g} / \mathrm{cm}^{3}. The oil and the water do not mix.

Describe and explain the final position of the oil relative to the water.
description
explanation

[ 2 ]

Question (b)

(b)

An irregularly shaped solid object has a density of 2.7 g/cm32.7 \mathrm{~g} / \mathrm{cm}^{3}.

[ 5 ]

Question (i)

(i)

Describe a method to measure the volume of the irregularly shaped solid object.

[ 2 ]

Question (ii)

(ii)

The volume of the object is 83 cm383 \mathrm{~cm}^{3}.

Calculate the mass of the object.

mass =............................................................
[ 3 ]

Question 3

[Maximum number: 2]

Fig. 2.1 shows a ship loaded with containers.

Fig. 2.1

Fig. 2.1

The ship is made of steel.

The density of steel is 7800 kg/m37800 \mathrm{~kg} / \mathrm{m}^{3} and the density of water is 1000 kg/m31000 \mathrm{~kg} / \mathrm{m}^{3}.
Explain why the ship floats in the water.

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