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Questions and Answers
What is a chemical change?
What is a chemical change?
- A change that alters the state of matter
- A change that only affects the physical properties of a substance
- A change that does not involve the rearrangement of atoms
- A change that results in the formation of new substances (correct)
What is a key characteristic of a chemical change?
What is a key characteristic of a chemical change?
- Change in color only
- Change in state of matter only
- No change in chemical composition
- Irreversibility (correct)
Which of the following is an example of a chemical change?
Which of the following is an example of a chemical change?
- Mixing salt and sugar together
- Melting ice to obtain water
- Burning wood to produce ash and smoke (correct)
- Stretching a rubber band
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