SC-394
Diffusion
Lower Sec Science · Secondary 1 · Hard · Diffusion
A sealed bottle contains air and a few drops of perfume at the bottom. After a few minutes, a student at the top of the bottle smells the perfume. Which statement best explains this observation using diffusion?
- Perfume particles are too heavy to move in air.
- Perfume particles only move when air is stirred.
- Perfume particles move randomly and spread from a region of higher concentration to lower concentration.
- Air particles carry the perfume particles downwards only.
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