Biology PAG 8.3

PAG 8.3 Investigating the rate of diffusion

(These are suggestions. Teachers should consider what equipment to make available within each centre:)

•  Beetroot cylinders in a beaker of water  "Cork borer"

• Ruler

• Sharp knife or razor blade

• Liquid detergent (washing up liquid)

• Test tubes or boiling tubes

• Dropping pipettes

• 5 cm3 syringes

• Colorimeter

• Cuvettes

• water bath @ 30°C

• ethanol