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

Navjyot Kalra , 11 Years ago

Grade 10

5 Answers

Simran Bhatia

Last Activity: 11 Years ago

To explain the differences between changes that can or cannot be reversed, some examples are given below:

If we inflate a balloon, the size and shape of the balloon undergoes a change. However, the original size and shape of the balloon can be obtained back by allowing the air to escape from the balloon. This means that the change that occurs by inflating a balloon can be reversed. But, if the balloon bursts after being inflated, then its original size and shape cannot be obtained back. Thus, in this case, the change cannot be reversed.

If we fold a piece of paper, then the shape and size of the paper undergoes a change. In this case, the original shape and size of the original paper can be obtained back. Thus, this change can be reversed. However, if we cut the piece of paper, the change in the shape and size of the paper cannot be reversed.

After we roll out a chapatti from a ball of dough, the chapatti can be converted back into a ball. Thus, the change occurring here can be reversed. But, if we cook the chapatti on atawa, then it cannot be converted back into a ball of dough. Thus, the change is irreversible.

Saloni Rakholiya

Last Activity: 9 Years ago

can be reversed : reversible : physical : no new substance is formed: no energy gain or loss

cant be reversed:irreversible:chemical:new substances are formes:energy is obseorbed or given out

Adarsh

Last Activity: 9 Years ago

reversible: melting of ice, blowing the balloon, folding a paper etc

irreversible : burning of fuel, cookin food, rusting of iron etc

Ritika Das

Last Activity: 7 Years ago

In order to help you understand, let me tell you about both the physical and chemical changes included when concerning the burning of a simple candle.

Burning of candle melts the wax and hence its state changes from solid to liquid, to be solidified again, which is a physical change.

Again, the wax vapour combines with the atmospheric oxygen and changes the energy to the form of heat, light and carbon dioxide. It is a chemical change.

Amarjit

Last Activity: 7 Years ago

Suppose we heat sugar it convert s into blackish brown residue and this residue on cooling cannot be made into milk again hence this is irreversible.Whereas if cool water it converts into Ice and also on heating that ice again it converts into water. This is reversible.