Read the following story titled 'Eco-friendly Prithvi', and tick the most appropriate option(s) given in the brackets. Provide a suitable title of your choice for the story. Prithvi is preparing a meal in the kitchen. He chops vegetables, peels potatoes, and cuts fruits (physical changes/chemical changes). He collects the seeds, fruits, and vegetable peels into a clay pot (physical change/chemical change). The fruits, vegetable peels, and other materials begin to decompose due to the action of bacteria and fungi, forming compost (physical change/chemical change). He decides to plant seeds in the compost and water them regularly. After a few days, he notices that the seeds begin to germinate and small plants start to grow, eventually blooming into colourful flowers (physical change/chemical change). His efforts are appreciated by all his family members.
Physical changes. Chopping, peeling, and cutting only change the shape and size of the vegetables and fruits without forming any new substance.
Physical change. Collecting materials into a pot is just rearranging them without any chemical reaction or new substance formation.
Chemical change. Decomposition by bacteria and fungi produces new substances like compost, which has different properties from the original materials.
Chemical change. Germination and growth involve the formation of new substances as the seed transforms into a plant with roots, stem, leaves, and flowers.
Explanation
(i) These activities are similar to the examples in Activity 5.2 where crushing chalk or folding paper only changes appearance without forming new substances. (ii) This is similar to Activity 5.2 where materials remain the same even when their arrangement changes. (iii) The chapter mentions that decomposition of food waste into compost is a useful chemical change. (iv) Growth of living organisms involves chemical reactions that produce new substances and structures.