Key learning points

1. Water diffuses into and out of cells by osmosis; net movement is from a more dilute solution to a more concentrated one.
2. Investigating the effect of sucrose solution concentration on the mass of potato chips.
3. Use of appropriate apparatus to measure volumes, masses and times accurately.
4. Safe use of materials and apparatus.
5. Control of variables that might affect the results (e.g. temperature).

Common misconception

Keywords

• Osmosis - the net movement of water molecules through a selectively-permeable membrane from a dilute solution to a concentrated one

• Net movement - the overall movement of particles

• Mass - a measure of how much matter something contains, in grams

• Control - a variable which is kept constant between all experiments