NCERT Solutions for Class 6 Science Chapter 14: Water

NCERT Solutions for Class 6 Science chapter 14 that provided here, will help you know easy and simple answers even for the toughest questions in the chapter. All the NCERT solutions are prepared by subject experts. You will get here the detailed and accurate answers for all questions given in Class 6 Science NCERT Chapter 14. We have also arranged all these solutions in PDF format which students may easily download and save them to use as and when required.

NCERT Solution for Class 6 Science

Chapter 14 - Water

1. Fill in the blanks in the following:

(a) The process of changing water into its vapour state is called ________.

(b) The process of changing water vapour into water is called ________.

(c) No rainfall for a year or more may lead to ________ in the region.

(d) Excessive rains may cause ________.

Answer.

(a) The process of changing water into its vapour state is called evaporation.

(b) The process of changing water vapour into water is called condensation.

(c) No rainfall for a year or more may lead to drought in the region.

(d) Excessive rains may cause floods.

2. State for each of the following whether it is due to evaporation or condensation:

(a) Water drops appear on the outer surface of a glass containing cold water.

(b) Steam rising from wet clothes while they are ironed.

(c) Fog appearing on a cold winter morning.

(d) Blackboard dries up after wiping it.

(e) Steam rising from a hot girdle when water is sprinkled on it.

Answer.

(a) Condensation

(b) Evaporation

(c) Condensation

(d) Evaporation

(e) Evaporation

3. Which of the following statements are “true”?

(a) Water vapour is present in air only during the monsoon. ( )

(b) Water evaporates into air from the oceans, rivers, and lakes, but not from soil. ( )

(c) The process of water changing into its vapour is called evaporation. ( )

(d) The evaporation of water takes place only in sunlight. ( )

(e) Water vapour condenses to form tiny droplets of water in the upper layer of air, where it is cooler. ( )

Answer.

(a) False; some amount of water vapour is always present in air in all seasons.

(b) False; water also gets evaporated from the upper layer of the soil.

(c) True

(d) False; evaporation of water may take place in absence of sunlight. During the daytime all the air surrounding us gets heated. This warm air provides heat for evaporation of water in absence of sunlight.

(e) True

4. Suppose you want to dry your school uniform quickly. Would spreading it near an anghitior heater help? If yes, how?

Answer.

Yes, spreading of clothes near an angithi or a heater would help to dry the clothes quickly. This is because angithi or a heater provides heat that causes the water to evaporate at a faster rate.

5. Take out a cold bottle of water from the refrigerator and keep it on the table. After some time, you will notice a puddle of water around it. Why?

Answer.

This is because water vapour present in air collide with the surface of cold water bottle which and condenses into water droplets. These water droplets collect and form a puddle of water around the bottle.

6. To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.

Answer.

When we breathe out, we exhale carbon dioxide gas along with water vapours. The water vapour on colliding with the surface of the glass gets condensed due to which the glass becomes wet. This slightly wet glass can be easily cleaned with a soft cloth.

7. How are clouds formed?

The process of evaporation followed by condensation causes the formation of clouds. Water present on the earth’s surface gets evaporated due to sunlight, and then rises up in the atmosphere. On reaching a certain height, water vapour present in air condenses to form tiny droplets of water. These water droplets collect to form clouds that float in air.

8. When does a drought occur?

Answer.

Scarcity of water at a region due to very less or no rainfall for a long time leads to draught in that region.

Students may download all the NCERT solutions for Class 6 Science Chapter 14 in PDF format so thatthey are able to use these solutionswhenever required in offline mode. Link to download the solutions is given below:

Download CBSE Class 6 Science NCERT Solutions for Chapter 14

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