Final answer:
To quickly differentiate between ferrous and non-ferrous metals, use a magnet: if the metal is attracted, it is ferrous; if not, it is non-ferrous.
Explanation:
A quick test to determine if a metal is ferrous or non-ferrous is to use a magnet. If the metal is attracted to the magnet, it is likely a ferrous metal containing iron. If it is not attracted, then it is likely a non-ferrous metal like aluminum, copper, zinc, or gold.
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