Question detail
What is the process called that breaks down sewage sludge in the absence of oxygen?
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. Aerobic digestion
- B. Anaerobic digestion
- C. Filtration
- D. Sedimentation
Answer
The correct option is Anaerobic digestion. This answer is correct because it matches the approved learning objective to describe anaerobic digestion of sewage sludge in the subtopic Waste water treatment.
Explanation
The correct option is Anaerobic digestion. Anaerobic digestion is correct because it directly supports the approved learning objective to describe anaerobic digestion of sewage sludge. 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 Anaerobic Digestion
Students often confuse anaerobic digestion with aerobic processes, thinking that oxygen is required for the breakdown of sewage sludge.
Remember that anaerobic digestion occurs in the absence of oxygen, allowing bacteria to break down organic matter in sewage sludge.
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