SC-378
Diffusion
Lower Sec Science · Secondary 1 · Hard · Diffusion
A drop of blue ink is placed gently into a beaker of still water. After some time, the entire beaker of water becomes light blue without stirring. Which statement best explains this observation using the idea of diffusion?
- Water particles pull the ink particles downwards by gravity.
- Ink particles sink to the bottom and stay there permanently.
- Ink particles move randomly and spread from a region of high concentration to low concentration.
- Water particles become larger and push the ink particles apart.
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