A rock counts as an ore if it contains [ ] to make extraction [ ].
A rock counts as an ore if it contains enough metal or metal compound to make extraction technically possible.
A rock counts as an ore if it contains traces of metal or metal compound to make extraction economically worthwhile.
A rock counts as an ore if it contains enough waste rock or unwanted material to make extraction technically straightforward.
A rock counts as an ore if it contains enough metal or metal compound to make extraction economically worthwhile.
Flashcards for CIE IGCSE Chemistry Extraction of metals, covering the key terms, formulae and methods you need to recall for Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended), plus Paper 5 or Paper 6. 30 cards, matched to the CIE IGCSE Chemistry (0620) specification.
