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 is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. 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.