Question detail
Why are new methods for extracting copper needed as high-grade copper ores become scarce?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Using the Earth's resources and obtaining potable water
Question
Why are new methods for extracting copper needed as high-grade copper ores become scarce?
Answer
New methods for extracting copper are needed because high-grade copper ores are limited resources, and as they become depleted, alternative methods such as bioleaching and phytomining are necessary to efficiently extract copper from lower-grade ores.
Explanation
A strong answer should directly address the approved learning objective to distinguish extracting copper from low-grade ores from extracting metals by reduction with carbon. This question belongs to Alternative methods of extracting metals within Using the Earth's resources and obtaining potable water, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to low-grade ore, and keeps the wording specific to AQA GCSE revision.
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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