III. Match the following:
Column A
1. Slow change
2. Fast change
3. Reversible change
4. Irreversible change
5. Periodic change
6. Non-periodic change
7. Desirable change
8. Undesirable change
9. Exothermic change
10. Endothermic change
Column B
(a) ploughing a field
(b) stretching of a spring
(C) cooking of food
(d) bursting of a cracker
(e) formation of curd from milk
(f) weathering of rocks
(g) evaporation of alcohol
(h) motion of a swing
(i) hammering of metals into sheets
(j) growth of a tree
(k) rusting of iron
(l) formation of seeds from flowers
(m) breaking a glass tumbler
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- Slow change - growth of a tree
- Fast change - breaking a glass tumbler
- Reversible change - weathering rocks
- Irreversible change - motion of a swing
- Periodic change - ploughing of field
- Non-periodic change - formation of seeds from flowers
- Desirable change - evaporation of alcohol
- Undesirable change - cooking of food
- Exothermic change - hammering of metals into sheets
- Endothermic change - rusting of iron
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