BI-1665
Diffusion
Biology · Secondary 4 · Hard · Diffusion
A student places a drop of blue dye at one end of a beaker of still water. After 10 minutes, the whole beaker of water becomes light blue. Which statement best explains this observation?
- Dye molecules move from a region of higher concentration to lower concentration by diffusion.
- Water molecules move from a region of higher concentration to lower concentration by osmosis.
- Dye molecules are carried around the beaker by convection currents only.
- Water molecules actively pump the dye across the beaker using energy.
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