# A student has two different liquids, liquid X and liquid Y. Liquid X has a greater mass than liquid Y, but both liquids occupy the same volume. State what is meant by density and explain which liquid has the greater density.

> Cambridge International IGCSE Physics (0625) — 1.4 Density · Explain · 4 marks

## Mark scheme (4 marks)

1. Density is the mass per unit volume (of a substance/object)
2. Liquid X has a greater density than liquid Y
3. Because density depends on mass divided by volume, and both liquids have the same volume
4. Liquid X has greater mass (for the same volume), so its density is greater

## Key terms

- [density](https://www.gradenine.co.uk/glossary/density)
- [mass](https://www.gradenine.co.uk/glossary/mass)
- [volume](https://www.gradenine.co.uk/glossary/volume)

## Related

- [Revision notes for Cambridge International IGCSE Physics (0625)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/a-student-has-two-different-liquids-a647855c) · Published by Druglandscape Ltd.