Question detail
What is a disadvantage of extracting copper from low-grade ores?
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. It is less environmentally sustainable.
- B. It produces more copper.
- C. It is a faster process.
- D. It requires no additional resources.
Answer
The correct option is It is less environmentally sustainable.. This answer is correct because it matches the approved learning objective to distinguish extracting copper from low-grade ores from extracting metals by reduction with carbon in the subtopic Alternative methods of extracting metals.
Explanation
The correct option is It is less environmentally sustainable.. It is less environmentally sustainable. is correct because it directly supports the approved learning objective to distinguish extracting copper from low-grade ores from extracting metals by reduction with carbon. This belongs to the subtopic Alternative methods of extracting metals 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 Alternative methods of extracting metals.
Common mistake
Confusing Extraction Methods
Students often confuse the extraction of copper from low-grade ores with the reduction of metals using carbon.
Do not treat this as a general statement about low-grade ore. Instead, answer by clearly linking the correction to distinguish extracting copper from low-grade ores from extracting metals by reduction with carbon in Alternative methods of extracting metals. 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 extraction of copper from low-grade ores with the reduction of metals using carbon.
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