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Question
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
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Solution
Examples of irreversible changes.
- Milk into curd
- Burning of wood
- Ripening of fruits
- Digestion of food
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Change is the ______ of a substance from one form to another.
Rusting of iron is a reversible change.
Paheli had bought a new bottle of pickle from the market. She tried to open the metal cap to taste it but could not do so. She then took a bowl of hot water and immersed the upper end of the bottle in it for five minutes. She could easily open the bottle now. Can you give the reason for this?
A potter working on his wheel shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your answer.
Circle the odd one out. Give a reason for your choice.
