Class VI CBSE NCERT Chapter -15: Water Solved Questions

Class VI CBSE NCERT Chapter - 15: Water and Its conservation 

MULTIPLE CHOICE QUESTIONS

1. Which of the following activity does not involve use of water?

(a) Washing clothes

(b) Bathing

(c) Cleaning utensils

(d) Drying wet clothes

2. In which of the following activities will you use minimum amount of water?

(a) Bathing

(b) Brushing teeth

(c) Washing clothes

(d) Mopping a room

3. The quantity of water required to produce one page of your book is

(a) one bucket

(b) ten buckets

(c) Two glasses

(d) Few drops

4. Water in our tap comes from a

(a) river

(b) Lake

(c) Well

(d) River, lake or well

5. In which of the following case evaporation of water will be slowest?

(a) A tray of water kept in sunlight.

(b) A kettle of water kept on a burner.

(c) A glass of water kept in a room.

(d) A bucket of water kept on rooftop.

Answer to MULTIPLE CHOICE QUESTIONS Chapter: Water

1. (d) 2. (b) 3. (c) 4. (d) 5. (c) 

Answer these questions

1.Why do wet clothes placed on a clothes line get dry after some time? Explain.

Ans: it is due to evaporation of water by the heat of the sun

2. Wet clothes dry faster if you keep them under a fan. Why? 

Ans: The rate of  Evaporation increases with increase in wind speed so, Wet clothes dry faster if you keep them under a fan

3. How does water kept under the shade of a tree also gets evaporated?

Ans: Air around us gets heated from sunlight. This warm air provides heat for evaporation of water kept in the shade.

4. Why is there a need for conserving water? Give two reasons.

Ans: (i) Increasing population need more water.

(ii) Availability of water is decreasing day-by-day.

5. If you won’t drink enough water, what happens to your body? 

Ans: There will be deficiency of water in body termed as dehydration. Our body temperature increases ,skin shrink, digestion problem etc

6. You are drenched completely while playing in the rain. But you did not stop playing. To your surprise, your clothes dried after some time. How? 

Ans: Clothes dried after some time due to body heat produced while playing.

7.  In what ways does water serves to sustain life?

Ans: Water help to control biological process of our body like ingestion, transpiration, excretion etc. We use water for house hold work and agricultural work.
8. A village near a river will always get ground water where as a village which is far away will face acute water problem. Why? 

Ans: The major part of river seeps down through the soil and form Layer of ground water called Layer of water table. A village which is far away will face acute water problem as the rate of the formation of water is very slow

Links for further Study Chapter:Natural Resources-water

6th Natural Resources-water Test paper -1
Download File 
6th Natural Resources-water Test paper - 2
Download File
 Solved CBSE Test Paper visit link-1: 
View/Download 

Solved CBSE Test Paper visit link-2: 
View/Download 

Water 'A precious resources' CBSE Class VI Science

Q. Why are we left only tiny fraction of water for use even if about 75 % of the earth surface is covered with water.
Ans: This is because most of the water about 97% of surface water is in sea and ocean as salty water that is unfit for domestic and agricultural use.
Q. What are the various uses of water?
Ans: Water is used for various activities such as agriculture, industries, cooking, cleaning utensils,
bathing, washing clothes, and, most importantly, for drinking.
Q. What are the three state of water?

Ans: There are three states of water
a. Solid state: ice, snow and hail           b. liquid: Rain, river, sea   c. Gaseous: Water vapour
Q what is water cycle?
Ans: The circulation of water from atmosphere to the earth and vice versa is called the water cycle.
Q.What is evaporation?
Ans: The water present on the surface of the ocean evaporates by the sun’s heat. This process of conversion of water from liquid state to vapour state is called evaporation.
Q what is transpiration?
Ans: The excess water in plants evaporates through stomata of leaves and the stem into the air. This process is called transpiration.
Q. How cloud is formed?
Ans: The evaporated water above the earth surface is carried away by warm air. As the warm air moves higher from the surface of the Earth, it starts to cool down. It is because the water vapour present starts to condense to form tiny water droplets. These droplets float in the air and form cloud
Q. What is precipitation?
Ans: When clouds rub together heat is produced that melt the cloud into droplets. These droplets collect to form bigger drops of water. Some of them may become too heavy fall down as rain. This process is known as precipitation.
Q .What do you mean by infiltration?
Ans: The water from rain, rivers, lakes and ponds seeps through the soil and fills the space below the ground. The process of seeping of water through the soil is called infiltration
Q. What do you mean by aquifer?
Ans: Some places groundwater is stored between layers of hard rock. This is called aquifer. Water from aquifers is pumped and taken out through hand pumps and tube wells.
Q. How can we conserve water?
Ans: Water conservation is process of preventing wastage of water, using water carefully and recharging ground water. Water conservation can be done by :-
i) Repairing leaking pipes and taps.        
ii) Not wasting water during brushing teeth, shaving, bathing, washing clothes and during other activities.
iii) Rainwater harvesting.      
iv) By drip irrigation of plants.
Q. Fill in the blanks with the appropriate answers:
(a) People obtain ---------through tube wells and hand pumps.[groundwater]
(b) Three forms of water are solid, liquid and ---------[vapour.]
(c) The water bearing layer of the earth is ----------[ aquifer]
(d) The process of water seepage into the ground is called ---------[ infiltration.]
(e) The process of changing of water into its vapour is called---------[ evaporation.]
(f) The process of changing water vapour into water is called ---------[condensation.]
(g) No rainfall for a year or more may lead to ---------- in that region.[drought]
(h) Excessive rains may cause ----------- [flood.]