This key facts covers Key Facts within Density for GCSE Mathematics. Revise Density in Ratio & Proportion for GCSE Mathematics with 14 exam-style questions and 3 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 6 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Key Facts
| Formula | Density = Mass ÷ Volume |
| Triangle | D = M/V, M = D×V, V = M/D |
| Units | g/cm³ or kg/m³ |
| Water | 1 g/cm³ (objects less dense than this float) |
| Conversion | 1 g/cm³ = 1000 kg/m³ |
Practice questions for Density
Which formula correctly shows how density (D), mass (M) and volume (V) are related?
Explain what is meant by a density of 5 g/cm³.
Quick recall flashcards
Density Formula
Density = Mass ÷ Volume. Units: g/cm³ or kg/m³. Cover what you need in the triangle!
Floating Rule
Objects float if their density is LESS than the liquid. Water = 1 g/cm³, so anything under 1 g/cm³ floats.