Correct: milk curdling, baking a cake, cooking an egg, burning wood, burning a candle, digesting foods, rotting banana, fireworks, mixing vinegar and baking soda, baking cookies, rusting nail, lighting a match, Incorrect: cracking an egg, boiling water, freezing water, chopping wood, cutting bread, chewing food, shredding paper, mixing gray and green marbles, making a sandwich, breaking a pencil, melting ice,

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