Diffusion is a process whereby molecules move from areas of their higher concentration to areas of their lower concentration.
When will it stop?
It will stop when all the molecules are evenly dispersed.
Do molecules even stop moving?
Molecules never stop moving. They are always moving because of their kinetic energy.
What are the factors that determine the rate of diffusion?
Temperature, size of molecules and the steepness of the concentration gradient.
Can you name some examples of diffusion in a living organism?
1. Diffusion takes place when animals breathe in oxygen and that oxygen is distributed to all cells in that animal. Carbon dioxide in turn is also diffused from the cells into the lungs to be breathed out.
2. Diffusion takes place when a plant takes in carbon dioxide and gives out oxygen during photosynthesis.
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