Question detail
Which of the following is a component of sewage that necessitates treatment?
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
- B. Pure water
- C. Mineral salts
- D. Oxygen
Answer
The correct option is Organic matter. This answer is correct because it matches the approved learning objective to explain why urban lifestyles and industrial processes produce waste water that needs treatment in the subtopic Waste water treatment.
Explanation
The correct option is Organic matter. Organic matter is correct because it directly supports the approved learning objective to explain why urban lifestyles and industrial processes produce waste water that needs treatment. 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
Misunderstanding Waste Water Sources
Students often confuse the sources of waste water, thinking it only comes from domestic use rather than also from industrial processes.
Emphasize that waste water is produced from both urban lifestyles and industrial processes, and provide examples of each.
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