Define radio carbon dating
Each of the bars in this graph represents a different junkyard; the different colored blocks represent percentages of artifact types within those junkyards.The gramophone sat in your parlor and certainly couldn't be carried along with you and your earbobs. When 78 rpm records first appeared on the market, they were very rare.When they became popularly available, you could find them everywhere; but then the technology changed and they became rare again. Archaeologists investigate trash, not shop window displays, so we measure things when they are discarded; in this example, we're going to use junkyards.Archaeologists call this kind of behavior "curation" -- people then, just like today, like to hang on to old things.
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