Worksheet: Water | Science Class 6 PDF Download

Q1. Fill in the blanks:

i. Water vapor gets added to air by                  .
ii. The circulation of water between ocean and land is known as the                   .
iii.                 covers more than two thirds of the earth’s surface.
iv. In atmosphere water is present in huge quantities as              and               .
v. Water present in ocean and sea is                 for drinking.

Q2. True/False

i. Water evaporates faster on hot summer day compared to cloudy day. 
ii. Excessive rain in an area leads to droughts. 
iii. Water is a natural resource. 
iv. About one thirds of the Earth is covered with water. 
v. Heating is essential to convert water into its vapor. 

Q3. Which is the purest form of natural water?

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

Q5. Why water disappears from wet clothes as they dry up?

Q6. What are the different forms of water that exists on earth?

Q7. How much water is lost through transpiration by wheat plants that give us one kilogram of wheat?

Q8. Define water cycle.

Q9. How water enters the air?

Q10. Where do water in rivers and lakes come from?

Q11. Define condensation.

Q12. What do you understand by conservation of water?

Q13. Why water spilled on a floor dries up after some time?

Q14. Define transpiration.

Q15. What is evaporation?

Q16. Why is water in seas and oceans saline?

Q17. Why we rarely notice water vapor from a bucket full of water?

Q18. Why does a mist of tiny water droplets form when we breathe out on a window in winter?

Q19. Why rain clouds look grey in color?

Q20. Where water in the taps comes from?

Assertion and Reason Questions

Q21. Assertion (A): Role of oceans in supplying usable water is quite important.
Reason (R): When the sea water reaches us, in various other forms of sources of water, it is no more 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.

Q22. 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.

Q23. 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.

Q24. Assertion (A): In such areas where there is no vegetation the rain water flows quickly and has no effect on the top layer of soil of that area.
Reason (R): When water level rises in rivers, ponds, etc. Due to excessive rains it causes floods.
(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.