NCERT Exemplar Solutions Class 9 Science Solutions for Matter in our Surroundings - Exercise in Chapter 1 - Matter in our Surroundings

Question 4 Matter in our Surroundings - Exercise

During summer, water kept in an earthen pot becomes cool because of the phenomenon of

(a) diffusion

(b) transpiration

(c) osmosis

(d) evaporation


The answer is d) evaporation


Evaporation of water through pores of earthen pot reduces the temperature of immediate surroundings. This makes the water cool after some time.

Movement of water through plants and evaporation through its aerial parts is called transpiration.

Diffusion is the movement of a substance from an area of higher concentration to an area of lower concentration

If molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one it is called osmosis.

Video transcript
"hello everyone welcome to lido learning i am guri your science tutor today's question is during summers water kept in earthen pots becomes cool because of the phenomenon of a diffusion b transpiration c osmosis d evaporation so here four options have been given to you and you have to specify that the water which is kept in the earthen pots in summers becomes cool due to which phenomenon so let's start our answer we have earthen pots for water storage in the summers and in this the water is kept and these earthen pots they have some pores at its peripheries at its surface it has some minute pores earthen pods have some minute pores due to which the evaporation becomes easier for the water and this evaporation led to the fall in temperature in temperature of the water kept so when the temperature lowers the water is cool down and you get the cool water from the earthen pot so the correct option for this question will be evaporation due to evaporation of water from the pores of earthen pot the temperature of the water is lowered and the water we get is cool for more such videos please subscribe leader learning and for any doubts drop a comment thank you "
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