Question detail

Why is sewage treatment necessary?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Using the Earth's resources and obtaining potable water

Question

A. To increase the amount of organic matter.
B. To remove harmful microbes and pollutants.
C. To make it chemically pure.
D. To enhance its taste.

Answer

The correct option is To remove harmful microbes and pollutants.. 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 To remove harmful microbes and pollutants.. To remove harmful microbes and pollutants. 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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