Question detail
Why is it important to treat sewage before releasing it into the environment?
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. To increase the temperature of the water
- B. To remove harmful microbes and organic matter
- C. To add nutrients to the water
- D. To change the color of the water
Answer
The correct option is To remove harmful microbes and organic matter. This answer is correct because it matches the approved learning objective to describe screening and grit removal as early stages of sewage treatment in the subtopic Waste water treatment.
Explanation
The correct option is To remove harmful microbes and organic matter. To remove harmful microbes and organic matter is correct because it directly supports the approved learning objective to describe screening and grit removal as early stages of sewage 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 Screening and Grit Removal
Students often confuse screening and grit removal with the later stages of sewage treatment, thinking they are part of the biological treatment process.
Remember that screening and grit removal are initial steps that focus on removing large solids and grit before biological treatment occurs.
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