Worksheet: A Journey through States of Water - 2

Fill in the Blanks

(i) Water vapour gets added to air by                  .

(ii) The circulation of water between the ocean and the land is known as the                   .

(iii)                 covers more than two thirds of the Earth's surface.

(iv) In the atmosphere water is present in huge quantities as              and               .

(v) Water present in oceans and seas is                 for drinking.

True or False

(i) Water evaporates faster on a hot summer day compared to a cloudy day. 

(ii) About one third of the Earth is covered with water. 

(iii) Heating is essential to convert water into its vapour. 

​Short Questions Answers

Q3: Which is the purest form of natural water?

Q4: Name the process involved in the formation of clouds.

Q5: Why does water disappear from wet clothes as they dry up?

Q6: What are the different forms of water that exist on Earth?

Q7: Define the water cycle.

Q8: How does water enter the air?

Q9: Where does the water in rivers and lakes come from?

Q10: Define condensation.

Q11: Why does water spilled on a floor dry up after some time?

Q12: What is evaporation?

Q13: Why is water in seas and oceans saline?

Q14: Why do we rarely notice water vapour from a bucket full of water?

Q15: Why does a mist of tiny water droplets form when we breathe out on a window in winter?

Assertion and Reason Questions

Q16: Assertion (A): The role of oceans in supplying usable water is quite important.
Reason (R): When sea water reaches us, as water in other forms or sources, it is no longer saline.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Q17: Assertion (A): The sea water is saline.
Reason (R): The sea water contains many dissolved salts.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Q18: Assertion (A): Sea water changes to water vapours by the process of transpiration in the presence of sunlight.
Reason (R): When sea water changes into water vapour, it leaves the dissolved salts behind.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

You can access the solutions to this worksheet here .