Question detail
Name three methods of sterilisation used in potable water treatment.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Using the Earth's resources and obtaining potable water
Question
Name three methods of sterilisation used in potable water treatment.
Answer
Three methods of sterilisation used in potable water treatment are chlorine, ozone, and ultraviolet light.
Explanation
A strong answer should directly address the approved learning objective to describe sterilisation as part of potable water treatment. This question belongs to Potable water within Using the Earth's resources and obtaining potable water, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to potable water, and keeps the wording specific to AQA GCSE revision.
Common mistake
Confusing Sterilisation Methods
Students often confuse sterilisation methods for potable water, thinking that all methods are the same.
Do not treat this as a general statement about potable water. Instead, answer by clearly linking the correction to describe sterilisation as part of potable water treatment in Potable water. This keeps the response inside Using the Earth's resources and obtaining potable water and prevents a vague or off-topic GCSE answer. The mistake to avoid is: students often confuse sterilisation methods for potable water, thinking that all methods are the same.
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