SC-361
Diffusion
Lower Sec Science · Secondary 1 · Medium · Diffusion
A teacher places a beaker of perfume at one end of a classroom. After a while, students at the other end can smell it. Which statement best explains this using the particle model?
- Gas particles move randomly and spread from high to low concentration by diffusion.
- Gas particles are fixed in place and pass the smell along by vibration only.
- Gas particles move only when heated, so the room must have become hotter.
- Gas particles are attracted to people, so they move directly towards the students.
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