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Grades 6, 7 and 8 - Science - Middle School - Changing Materials (reversible and irreversible changes)
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Changing materials is also transforming substances. Water, for example - when it is really cold it changes into ice, or when it is heated it changes into steam. Other substances can also be changed. Different substances react together in interesting ways, sometimes changing into new materials. Applying heat, cooling or adding water - all of these can change materials. 

Grades 6, 7 and 8 - Science - Middle School - Changing Materials (reversible and irreversible changes)
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10 Questions

1. Which of the following is an example of a reversible change?
2. Heating will produce what sort of change?
3. Which of the following is not an example of a reversible change?
4. Which of the following is not an example of an irreversible change?
5. If you were burning a candle, which of the following would be a reversible change?
6. What is a reversible change?
7. What is an irreversible change?
8. Which of the following is a sign of an irreversible change taking place?
9. Which of these mixtures is not an irreversible change?
10. Burning will produce what sort of change?

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