Question

Two examples of :
A. Desirable and undesirable change.
B. Periodic and non periodic chnage.
C. Slow and fast change.
D. Natural and man made change.
E. Reversible and irreversible change.
F. Physical and chemical change.​

Answer 1

Answer:

A)Desirable: Ripening of fruits, germination of seeds

  Undesirable: Rusting of iron, souring of milk, rottening of fruits

B)Periodic: The occurrence of day and night

   Non-periodic: Freezing of water to form ice

C)Slow change: Growth of a child to adult

   Fast change: Burning of an object

D)Natural change: Growth, movement, death

   Man-made change: Cutting down of trees

E)Reversible: Melting, freezing, boiling

  Irreversible: Burning, cooking, rusting of iron

F)Physical change: Freezing of water, melting of wax, boiling of water

  Chemical change:  Digestion of food, burning of coal, rusting

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