Activity 5.1 Let us think and reflect Table 5.1 Some changes observed around us Class 7
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Activity 5.1 Let us think and reflect Class 7
Activity 5.1 Let us think and reflect Class 7
Table 5.1 Some changes observed around us
| Change | Observation(s) |
| 1. Melting ice cubes | |
| 2. Chopping vegetables | |
| 3. Boiling water | |
| 4. Making popcorn from corn | |
| 5. Cutting a piece of paper | |
| 6. Adding beetroot extract to water | |
| 7. Burning wood | |
| 8. Drying wet clothes | |
| 9. Making small balls of dough | |
| 10. Rolling small balls of dough into chapatis | |
| 11. Cooking of food | |
| 12. Making milk shake | |
| 13. Making halwa |
Answer:
| Change | Observation(s) |
| 1. Melting ice cubes | Ice melts to water, state changes |
| 2. Chopping vegetables | Size and shape changes |
| 3. Boiling water | Water changes to water vapour, state changes |
| 4. Making popcorn from corn | Corns get roasted into bigger size popcorns (new substance formed), shape and size changes |
| 5. Cutting a piece of paper | Shape and size changes |
| 6. Adding beetroot extract to water | Colour of water changes to pink, identify by seeing. |
| 7. Burning wood | Wood changes to ash (new substance formed), heat and light produced |
| 8. Drying wet clothes | Water from wet clothes gets evaporated, state of water changes from liquid to gas. Wet clothes became dry. By touch we identify. |
| 9. Making small balls of dough | Shape and size changes |
| 10. Rolling small balls of dough into chapatis | Shape and size changes |
| 11. Cooking of food | Composition and taste changes |
| 12. Making milk shake | Shape, size and thickness of ingredients changes. |
| 13. Making halwa | By smell we identify change. |