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Junior Cycle · Junior Cycle Science

Junior Cycle Science: Measurement & density

How often Measurement & density comes up on the Science papers, every year it was asked, and questions to try.

CL Asked on 5 of the last 6 Common Level papers, most recently in 2026. most years

Measurement & density, Common Level(7 marks)

Quick ones on Measurement & density.

(a)What is the SI unit of mass?
  1. Newton (N)
  2. Kilogram (kg)
  3. Cubic metre (m³)
(b)A block has a mass of 60 g and a volume of 20 cm³. What is its density?
  1. 0.33 g/cm³
  2. 1200 g/cm³
  3. 3 g/cm³
(c)Which apparatus helps you find the volume of an irregular stone?
  1. Overflow can
  2. Thermometer
  3. Metre stick
Show the answers

(a) Kilogram (kg)

(b) 3 g/cm³

(c) Overflow can

Your turn: Common Level questions on Measurement & density.

Common Level

Asked on 5 of the last 6 Common Level papers, most recently in 2026. most years

Every paper, year by year

YearWhere it came up
2026Q6
2025Q9, Q12
2024Q3
2023Not asked
2022Q1, Q5
2019Q2

Links open the State Examinations Commission’s paper for that year.

More Measurement & density questions

Measurement & density, 2 marks

Which instrument would measure the thickness of a coin most accurately?

  1. A metre stick
  2. A trundle wheel
  3. Callipers
Show the answer

Callipers

Callipers (vernier or digital) measure small lengths to a fraction of a millimetre. A metre stick only reads to 1 mm; a trundle wheel measures long distances outdoors.

Measurement & density, 3 marks

A 150 g stone raises the water in a graduated cylinder from 50 cm³ to 80 cm³. What is its density?

  1. 1.9 g/cm³
  2. 5 g/cm³
  3. 3 g/cm³
Show the answer

5 g/cm³

Volume of stone = 80 - 50 = 30 cm³. Density = mass ÷ volume = 150 ÷ 30 = 5 g/cm³. Using 50 or 80 as the volume is a common mistake.

Other Science topics

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