Question

Which of the following is a sign that a chemical change has taken place when wood burns

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Another clue that a chemical change has occurred is the formation of a solid. A solid that separates out of solution during a chemical change is called a precipitate. As wood burns, it turns into a pile of ashes and gases that rise into air. After the wood is burned, it cannot be restored to its original form as a log.