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प्रश्न
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.
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उत्तर
The two acts lead to the different kind of changes. Shaping of pot on a wheel is a physical, reversible change while baking the pot in an oven is an irreversible change.
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संबंधित प्रश्न
Long Answer Type Question:
Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.
Circle the odd one.
Give examples to explain the difference between changes that can or cannot be reversed.
Dissolving sugar in water is a ______ change.
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
Can we reverse the following change? If yes, suggest the name of the method.
Water vapour into water
Which of the following changes cannot be reversed?
- Blowing of a balloon
- Folding paper to make a toy aeroplane
- Rolling a ball of dough to make roti
- Baking cake in an oven
- Drying a wet cloth
- Making biogas from cow dung
- Burning of a candle
Find the odd one out and give reason for your choice.
Choose the odd one out. Give a reason for your choice.
Choose the odd one out. Give reason for your choice.
