AQA GCSE Physics Required Practical: Density –
FULL Grade 9 Guide
This sheet follows the AQA GCSE Physics required practical on density. You must know how to
measure density of regular and irregular objects, including all equations, methods, errors, and
exam-style explanations.
Theory
1Density equation: density = mass ÷ volume
2Symbol form: ρ = m / V
3Units: kg/m³
Aim
1Determine the density of regular and irregular objects.
Equipment
1Balance
2Ruler (for regular objects)
3Measuring cylinder
4Eureka can
5Water
6Object to measure
Method (Regular Objects)
11. Measure mass using a balance.
22. Measure dimensions using a ruler.
33. Calculate volume (e.g. length × width × height).
44. Calculate density using ρ = m / V.
Method (Irregular Objects)
11. Measure mass using a balance.
22. Fill Eureka can until water runs from spout.
33. Place object in can and collect displaced water.
44. Measure volume of water in measuring cylinder.
55. Calculate density using ρ = m / V.
