Question detail
What is sewage primarily composed of?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Using the Earth's resources and obtaining potable water
Question
- A. Organic matter and harmful microbes
- B. Pure water and minerals
- C. Chemical pollutants and heavy metals
- D. Clean drinking water and nutrients
Answer
The correct option is Organic matter and harmful microbes. This answer is correct because it matches the approved learning objective to describe sewage as waste water that contains organic matter and harmful microbes in the subtopic Waste water treatment.
Explanation
The correct option is Organic matter and harmful microbes. Organic matter and harmful microbes is correct because it directly supports the approved learning objective to describe sewage as waste water that contains organic matter and harmful microbes. This belongs to the subtopic Waste water treatment within Using the Earth's resources and obtaining potable water, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Waste water treatment.
Common mistake
Confusing Sewage with Other Waste Types
Students often confuse sewage with other types of waste water, failing to recognize that sewage specifically contains organic matter and harmful microbes.
Do not treat this as a general statement about microbes. Instead, answer by clearly linking the correction to describe sewage as waste water that contains organic matter and harmful microbes in Waste water treatment. 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 sewage with other types of waste water, failing to recognize that sewage specifically contains organic matter and harmful microbes.
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