This key facts covers Key Density Values 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 3 of 13 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 3 of 13
Practice
13 questions
Recall
30 flashcards
📚 Key Density Values
| Material | Density (kg/m³) | Density (g/cm³) |
|---|---|---|
| Air | 1.2 | 0.0012 |
| Ice | 920 | 0.92 |
| Water | 1000 | 1.0 |
| Aluminium | 2700 | 2.7 |
| Steel/Iron | 7800 | 7.8 |
| Copper | 8900 | 8.9 |
| Gold | 19,300 | 19.3 |
The water benchmark:
- Objects with density < 1000 kg/m³ (or < 1 g/cm³) FLOAT in water
- Objects with density > 1000 kg/m³ (or > 1 g/cm³) SINK in water
- Ice floats because it's LESS dense than liquid water (unusual property!)
Two common units:
- kg/m³ — SI unit, used in most calculations
- g/cm³ — often used for small objects; easier numbers
- Conversion: 1 g/cm³ = 1000 kg/m³