Required Practical: Decay (AQA GCSE Biology)

RP10: Decay in Milk

• Aim: To investigate the effect of temperature on the rate of decay of fresh milk by measuring pH change

• You will:

  • Decide on the range of temperatures that you wish to investigate milk decay over, considering the lesson time you have

  • Use an indicator to monitor the rate of decay of milk

How to investigate the effect of temperature on the rate of decay of fresh milk by measuring pH change

Decay in milk: analysis

• You will:

  • Calculate the rate of decay of fresh milk incubated at three different temperatures

  • Draw a graph of the results

How to calculate rate of decay