While some of the lead found in an artifact may have been introduced from flux or when other metals were added to the copper ore, lead so added in Bronze Age processing would usually have the same isotopic composition as the lead in the copper ore. Lead isotope 50 studies may thus prove useful for interpreting the archaeological record of the Bronze Age.
4. The author first mentions the addition of flux during smelting in the last sentence in the last paragraph in order to
give a reason for the failure of elemental composition studies to determine ore sources
illustrate differences between various Bronze Age civilizations
show the need for using high smelting temperatures
illustrate the uniformity of lead isotope composition
explain the success of copper isotope composition analysis For the following question, consider each of the choices separately and select all that apply
5. According to the passage, possible sources of the lead found in a copper or bronze artifact include which of the following?
□A The copper ore used to manufacture the artifact
□B Flux added during processing of the copper ore
□C Other metal added during processing of the copper ore
6. Select the sentence in the passage that the author rejects copper as the ideal choice.
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