2. Jenny broke a porcelain vase into uncountable pieces. Can she get the vase back to its original form using an adhesive? What type of change has occurred in the porcelain vase? 3. Can the occurrence of day and night be considered as a periodic change? Give reason for your answer. 4. Can the process of lighting a matchstick by striking it with the 'striking edge of the match box, be considered as a fast change? Justify your answer.
Answers
Explanation:
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Answer:
2. No, she cannot get back the same vase using adhesive as it has broken into many pieces. A physical, but irreversible change has occurred as the chemical composition of the vase did not change, but it cannot be brought back.
3. Yes, the occurrence of day and night can be considered as periodic change as this happens regularly at periodic intervals (there is an interval of almost 24hrs between two successive days and also between two successive nights).
4. Yes, the process of lighting a matchstick by striking it with the striking edge of the matchbox can be considered as a fast change as the match gets lighted as soon as we strike it. Moreover, all the changes involved at the molecular level take place simultaneously and not gradually. So, it is a fast change.
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