2024HSCShort answer

Q22 (b)

2 marks

Question

A student designed and conducted a practical investigation to test for the presence of microbes in water and food samples.
Explain how the student could ensure the reliability of the investigation.

Try the question before revealing the answer.

Solution

Criteria	Marks
Explains how to ensure the investigation is reliable	2
Provides some relevant information	1

Sample answer:

The student could repeat the experiment by using five plates to culture the same sample of food or water. This would mean the student could check that the results are similar in each test.

Supplied marking guidance · human reviewed

Compare this with your working, not only your final sentence.

Syllabus alignment

Module 7 · Infectious Disease

Causes of Infectious DiseaseDesign and conduct microbial testing of water or food samples.

Spot a problem? Send feedback