To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?

One Line Answer

Yes. The length of the dress can again be increased by unfolding it. Hence, this change can be reversed.

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Very Short Answer Type Question:
Some common changes are given in the below Table. Which of these changes do you think can be reversed?

Change	Can be reversed
(i) Raw egg to boiled egg	Yes/No
(ii) Batter to idli
(iii) Wet clothes to dirty clothes
(iv) Woollen yarn to knitted sweater
(v) Grain to its flour
(vi) Cold milk to hot milk
(vii) straight string to a cold string
(viii) Bud to flower
(ix) Milk to paneer
(x) Cow dung to biogas
(xi) stretched rubber band to its normal size
(xii) Melting of ice-cream

An example for reversible change is

Circle the odd one.

Choose the odd one out. Give reason for your choice.

Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene

Give examples to explain the difference between changes that can or cannot be reversed.

Water on ______ changes to ice and on ______ comes back to water.

What are irreversible changes?

Can we reverse the following change? If yes, suggest the name of the method.

Water vapour into water

Tearing of paper is said to be a change that cannot be reversed. What about paper recycling?

Give one example of change occurs on mixing two substances, but can be reversed.