Which event represents a chemical change? breaking glass chopping wood crushing a can milk turning sour nextreset

  The event that represents a chemical change is milk turning sour.

  A chemical change occurs when a substance combines with another to form a new substance, this procces in general are not reversibles.

  In the case of the milk it contains a type of sugar called Lactose and also harmless bacterias called lactobacillus which uses the lactose to produce energy and creates lactic acid. This is the thing which makes milk taste sour.

  I hope that the answer help you.

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explanation:

recent news about two years ago indicates that a polish forestry student by chance unearthed at a depth of about 40cm (16 inches), during digging in a damp polish forest he found a 13-page manuscript into a thermos flask.

greek jew marcel nadjari was a aischwitz slave who witnessed how the nazi's built big death chambers and crematoriums and told how he was forced to escort fellow jews to the gas chambers. he accounts on this manuscript how the nazi's disguised this chambers to look like showers. also, he describes this place as a process of extermination from the chambers to the trains arriving to take the bodies.