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प्रश्न
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
उत्तर
If we draw a picture on a drawing sheet with a pencil, we can get back the original drawing sheet by erasing the drawing with an eraser. In this case, the change can be reversed.
However, if we draw with a pen, then the original drawing sheet cannot be obtained back because we cannot erase ink. Hence, in this case, the change cannot be reversed.
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संबंधित प्रश्न
Burning of match stick is a reversible change.
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
Water changes into ice on cooling is an example of ______.
Water on ______ changes to ice and on ______ comes back to water.
What are irreversible changes?
The blackening of the Silver anklet is a (an) ______.
Touch me not plant: ______:: digestion of food: Irreversible change.
Can we reverse the following change? If yes, suggest the name of the method.
Water vapour into water
Paheli mixed flour and water and
- made a dough,
- rolled the dough to make a chapati,
- baked the chapati on a pan,
- dried the chapati and ground it in a grinder to make powder.
Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.
Find the odd one out. Give reason for your choice.
