Question detail
What is the main challenge in treating salty water compared to ground water?
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. Salty water is more expensive to treat
- B. Salty water requires more complex treatment processes
- C. Ground water is less available
- D. Ground water is always contaminated
Answer
The correct option is Salty water requires more complex treatment processes. This answer is correct because it matches the approved learning objective to compare treatment of ground water with treatment of salty water in the subtopic Potable water.
Explanation
The correct option is Salty water requires more complex treatment processes. Salty water requires more complex treatment processes is correct because it directly supports the approved learning objective to compare treatment of ground water with treatment of salty water. This belongs to the subtopic Potable water 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 Potable water.
Common mistake
Confusing Ground Water and Salty Water Treatment
Students often confuse the treatment processes for ground water and salty water, thinking they are the same.
Do not treat this as a general statement about ground water. Instead, answer by clearly linking the correction to compare treatment of ground water with treatment of salty water in Potable water. 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 the treatment processes for ground water and salty water, thinking they are the same.
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