- Books Name
- CBSE Class 6 Science Book
- Publication
- Param Publication
- Course
- CBSE Class 6
- Subject
- Science
TYPES OF CHANGES
(i) Reversible and irreversible changes
(a) Reversible change
A change which can be reversed by the conditions is called a reversible change.
eg. Melting of ice, dissolving of salt in water, drying of clothes etc.
(b) Irreversible change
A change that cannot be reversed by reversing the condition is called an irreversible change.
eg. Burning of paper, curdling of milk
Activity–1
AIM : To find out weather the change can be reversed or not.
Some common changes
Change Can be Reversed
Raw egg to boiled egg Yes/No
Batter to idli
Wet clothes to dry clothes
Woollen yarn to knitted sweater
Grain to its flour
Cold milk to hot milk
Straight string to coil string
Bud to flower
Milk to paneer
Cow dung to biogas
Stretched rubber band to its normal size
Solid ice cream to molten
Some common changes are given in above table. We have to find that the changes given can be reversed or not.
The answer of changes which can be reversed or not is given in Yes/no in the table below.
Some common changes
Change Can be Reversed
Raw egg to boiled egg No
Batter to idli No
Wet clothes to dry clothes Yes
Woollen yarn to knitted sweater Yes
Grain to its flour No
Cold milk to hot milk Yes
Straight string to coil string Yes
Bud to flower No
Milk to paneer No
Cow dung to biogas No
Stretched rubber band to its normal size Yes
Solid ice cream to molten Yes