Question

Give one example in each case that happens around you.

a. Slow and fast change 

b. Reversible and irreversible change 

c. Physical and chemical change 

d. Natural and man-made change 

e. Desirable and undesirable change

Answer 1

S. No.	Changes	Examples
a.	Slow change	growth of nail and hair
	Fast change	burning of a paper
b.	Reversible change	melting of ice
	Irreversible change	change of milk into curd.
c.	Physical change	Drying of cloth.
	Chemical change	rusting of iron
d.	Natural change	rotation of earth
	man- made change	construction of building
e.	Desirable change	Cooking of food
	Undesirable change	Deforestation.