What this practice covers
These questions are drawn from past CIE 0625 Physics papers and filtered to density. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
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What examiners see students get wrong here
These are the errors that cost marks on density, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Using the final level in a measuring cylinder as the volume instead of the rise.
- Forgetting to subtract the mass of the container from a stated total.
- Choosing the object with the greatest mass as the densest.
- Mixing g/cm³ and kg/m³, or missing the factor of 1000 between them.
- Dividing volume by mass instead of mass by volume; check with the units.
- Saying heating increases the density of a gas.
- Saying that compressing something increases its mass.
- Reading dimensions off a scale as endpoints rather than differences.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Density revision notes.