Density compares how much mass fits into a volume. Divide mass by volume to find it. A small object can be denser than a large object if it packs more mass into each equal amount of space. Size alone does not tell you density, and a heavier object is not automatically denser. In this water comparison, a uniform block less dense than water floats; a denser block sinks. Keep size fixed and change mass to compare.
Matter and chemistry · Discover & try
Can a small object be denser than a big one?
Reading level 1 of 5 · EarlyChange
Word help
mass
A measure of the amount of matter in a sample.
volume
The space a sample occupies.
Watch · Try · Explain
See how it works
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Imagined uniform blocks with independently chosen mass and volume; no material identity is inferred.
What to look for
- Same volume can hold different masses
- Same mass can occupy different volumes
- Proportional changes preserve the ratio
Explain what you noticed
Sample A is 12 g in 4 cm³. Sample B is 24 g in 8 cm³. Which is denser?
Keep this idea: Compare mass per equal volume, not size or mass alone.
Follow the sources
- American Chemical Society — What is Density?
- American Chemical Society — Finding Volume by Water Displacement
Source material checked 2026-10-29. Explanations and activities by Nepedia. Source links do not imply endorsement.
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