Question detail
Why is it important for potable water to have low levels of dissolved salts and microbes?
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
Why is it important for potable water to have low levels of dissolved salts and microbes?
Answer
Potable water must have low levels of dissolved salts to prevent health issues related to high salinity, such as dehydration. Additionally, low levels of microbes are essential to avoid waterborne diseases that can arise from contaminated water.
Explanation
A strong answer should directly address the approved learning objective to give reasons for the steps used to produce potable water. 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
Common Mistake in Potable Water Production
Students often state that all steps in producing potable water are equally important without recognizing the specific reasons for each step.
Do not treat this as a general statement about potable water. Instead, answer by clearly linking the correction to give reasons for the steps used to produce potable water 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 state that all steps in producing potable water are equally important without recognizing the specific reasons for each step.
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