Question

breaking a glass tumbler and burning a paper are changes in which we cannot get back the original substance.what is the difference between these 2 changes

Answer 1

Hello friend!
Here's ur answer!
Breaking of a tumbler is a physical change as after it breaks, no new substance is formed. It still has the properties of glass but it is broken into pieces.
Burning of a paper is a chemical change as after it burns it turns to ash and has no properties of paper.

Answer 2

Breaking a tumbler glass and burning paper are improvements we can't bring the basic substances back into.

Explanation:

Breaking a tumbler glass and burning paper are improvements we can't bring the basic substances back into. Difference between the two changes:-

Breaking of tumbler glass  

1. It results in the shape of the tumbler change.
2. The molecules which make up a glass remain identical.
3. This is a physical transition, because there are no different substances emerging.

Paper Burning :-

1. It contributes to water and smoke formation.
2. The paper molecules are transformed to the ash molecules.
3. This is chemical transition, since ash is transferred to paper.

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