Classify the following as slow and fast change.

Rusting of iron

Germination of seed

Cooking of food

Curdling of milk

Lightning of bulb

Burning of paper

Open in App

Solution

SLOW CHANGE: Rusting of iron, Germination of seed, Cooking of food, Curdling of milk

FAST CHANGE: Lightning of bulb, Burning of paper

Suggest Corrections

Similar questions

Q. Classify the following as slow or fast change:
(i) Bearing of heat
(ii) Change of seasons
(iii) Burning of paper
(iv) Weathering of rocks
(v) Melting of wax
(vi) Cooking of food
(vii) Burning of wax
(viii) Melting of ice cream
(ix) Curdling of milk
(x) Formation of day and night.

Question 4

(c) Classify the following processes into physical or chemical changes.
baking of bread, switching of an electric bulb, curdling of milk, dissolving sodium chloride in water, photosynthesis, rusting of iron, evaporation of water, formation of dew, sublimation of camphor, burning of charcoal or LPG, clotting of blood, crystallization of sugar, ripening of fruit, cooking of vegetables, melting of wax.

Why do we classify curdling of milk as slow change?

Q. Match the columns:

	I		II
(a)	Physical change	(i)	Curdling of milk
(b)	Chemical change	(ii)	Demagnetisation of magnets
		(iii)	Digestion of food
		(iv)	Crystallisation of substance
		(v)	Rusting of iron

Question 5.

Classify the following changes into fast and slow changes:

Explosion of a cracker, tooth decay, growth of a plant, fading of flowers, burning of cooking gas, taking x-ray photograph of a body part

Join BYJU'S Learning Program

Classify the following as slow and fast change. Rusting of iron Germination of seed Cooking of food Curdling of milk Lightning of bulb Burning of paper

SLOW CHANGE: Rusting of iron, Germination of seed, Cooking of food, Curdling of milk FAST CHANGE: Lightning of bulb, Burning of paper

Classify the following as slow and fast change.

Rusting of iron

Germination of seed

Cooking of food

Curdling of milk

Lightning of bulb

Burning of paper

SLOW CHANGE: Rusting of iron, Germination of seed, Cooking of food, Curdling of milk

FAST CHANGE: Lightning of bulb, Burning of paper