AQA GCSE Biology

Revision Notes

7.2.5 Required Practical: Decay

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

RP Decay in Milk_ Method (1), downloadable IGCSE & GCSE Biology revision notes

RP Decay in Milk_ Method (2), downloadable IGCSE & GCSE Biology revision notes

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

 

RP Decay in Milk_ Analysis (1), downloadable IGCSE & GCSE Biology revision notes

RP Decay in Milk_ Analysis (2), downloadable IGCSE & GCSE Biology revision notes

RP Decay in Milk_ Analysis (3), downloadable IGCSE & GCSE Biology revision notes

How to calculate rate of decay

Author: Jenna

Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.
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