lt was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli’s home: (i) Simba blew balloons and put them on the wall. (ii) Some of the balloons got burst. (iii) Paheli cut colourful strips of paper and put them on the wall with the help of tape. (iv) She also made some flowers by origami (paper folding) to decorate the house. (v) Her father made dough balls. (vi) Mother rolled the dough balls to make puries. (vii) Mother heated oil in a pan. (viii) Father fried the puries in hot oil.Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed.

Reversible activities	(i) Simba blew balloons and put them on the wall. (iv) She also made some flowers by origami (paper folding) to decorate the house. (v) Her father made dough balls. (vi) Mother rolled the dough balls to make puries. (vii) Mother heated oil in a pan.
Irreversible activities	(ii) Some of the balloons got burst. (iii) Paheli cut colourful strips of paper and put them on the wall with the help of tape. (viii) Father fried the puries in hot oil.