Mass, Weight and Density — Questions

IGCSE Physics (0625) practice questions. Work through each question before checking the solutions page.

Question 1

[2](a)State the difference between mass and weight.

[2](b)A rock has a mass of 60 kg on Earth, where g = 10 N/kg. Calculate its weight on Earth.

[2](c)Calculate the weight of the same rock on the Moon, where g = 1.6 N/kg.

Question 2

[2](a)A stone of mass 270 g is lowered into a measuring cylinder and displaces 100 cm³ of water. Calculate the density of the stone.

[1](b)A second, less dense material floats in water. State what this tells you about its density compared with water (1.0 g/cm³).

Question 3

[2](a)An object has a volume of 50 cm³ and a density of 8.0 g/cm³. Calculate its mass.

[2](b)The same object is melted down and reshaped, without any loss of material. State what happens to its mass and its density.

Question 4

[2](a)Calculate the weight of a 15 kg object on Earth, taking g = 10 N/kg.

Question 5

[2](a)A liquid of mass 200 g occupies 80 cm³. Calculate its density.

Question 6

[2](a)Calculate the mass of a piece of aluminium (density 2.7 g/cm³) with a volume of 40 cm³.

Question 7

[2](a)A metal has density 8.0 g/cm³. Calculate the volume occupied by 500 g of it.

Question 8

[2](a)Calculate the weight of a 10 kg object on Jupiter's surface, where g = 25 N/kg.

Question 9

[2](a)Explain why an object's mass stays the same on the Moon but its weight becomes smaller.

Question 10

[2](a)Two blocks have the same mass but different volumes. State which has the greater density, and explain your reasoning.

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