VII. Answer the following questions in briel: 1. Give two examples of changes due to heat. 2. What are the various forms of changes? 3. Discuss the reason for the shortening of a burning candle. What type of change is it? 4. In what way do things change when they are heated beyond certain temperatures? Are such changes reversible? 5. Why does milk in a saucepan overflow when heated over a gas stove?
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1 metal expand met turns black
2 physical change chemical change biological change
3 physical change
4 they undergo physical change the can be reversed
5 chemical change
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