What is osmosis?
Osmosis is the diffusion of water across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.
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What is the independent variable in the osmosis practical?
The independent variable is the concentration of the salt or sugar solutions.
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Name two control variables in the osmosis practical.
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Why must the potato cylinders be trimmed to the same length in the osmosis practical?
The potato cylinders must be the same length to ensure a fair test, so that the surface area for osmosis is the same.
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What causes the change in mass of the potato cylinders?
The movement of water by osmosis causes the change in mass.
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