GCSE Biology Required Practical 10

A lesson / revision PowerPoint covering all information needed and containing informative slides and practise questions

Required Practical 10 - Investigate the effect of temperature on the rate of decay of fresh milk by measuring pH change

This powerpoint covers AT 1 (use appropriate apparatus to record temperature and pH), AT 3 (the use of appropriate apparatus to measure anaerobic decay), AT 4 (safe use of microorganisms), AT 5 (measurement of rate of decay by pH change) and includes all practical and mathmatical skills required.

The powerpoint covers:

Background on decay and factors affecting the rate of decay
Aim
Required apparatus
A suitable method to measure the decay of milk and a method for a model experiment measuring the rate lipase breaks the fat in milk down into glycerol and 3 fatty acids
A suitable results table to record data and a graph to plot
How to calculate rate of change from raw data and graphs
How to plot graphs in the exam
Past paper exam questions
Summary