<span>Data collected from many experiments could not be explained using waves.</span>
Explanation:
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It is important to examine both the colour and the streak of a mineral because the streak may be completely different from the colour of the hand specimen.
The streak of a mineral is the color it possesses after it has been grounded to a fine powder. The streak test has to be done on minerals because it is a more reliable way of identifying a mineral with its color.<span />
If one or more of the following occur: Gas formation, precipitate formation, color change, temperature change, or odor
