This memory aid covers Memory Aid within Density for GCSE Physics. Revise Density in Particle Model for GCSE Physics with 13 exam-style questions and 30 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 9 of 13 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 9 of 13
Practice
13 questions
Recall
30 flashcards
🧠 Memory Aid
The equation triangle for density:
Write m at the top of a triangle, ρ (rho) bottom-left, V bottom-right. Cover the quantity you want:
- Cover ρ: density = m ÷ V
- Cover m: mass = ρ × V
- Cover V: volume = m ÷ ρ
Remember the symbol: ρ is the Greek letter "rho" — think "rho = ρack it in" (how tightly packed the material is).
Float or sink rule: "If density is greater than water (1000 kg/m³), it will sink. If less, it will float." — The word LESS has 4 letters, and so does FLOAT. More has 4 letters too, but think: MORE density = MORE sinking.
Keep building this topic
Read this section alongside the surrounding pages in Density. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Density
What is the correct equation for density?
Explain why gases have a much lower density than solids, using ideas about particles.
Quick Recall Flashcards
13 questions on Density — practise free
Instant marking, adaptive difficulty, and 30 spaced repetition flashcards. Free until your GCSEs.
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