This introduction covers What Is Density? 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 1 of 6 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
What Is Density?
Why does a small piece of lead feel heavier than a bigger piece of wood? It's about density! Density tells you how much MASS is packed into a given VOLUME. Lead atoms are tightly packed; wood has air gaps. More density = heavier for its size.
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
Floating Rule
Objects float if their density is LESS than the liquid. Water = 1 g/cm³, so anything under 1 g/cm³ floats.
Density Formula
Density = Mass ÷ Volume. Units: g/cm³ or kg/m³. Cover what you need in the triangle!