NCERT Solutions for Class 6 Science Chapter 14 Water
NCERT Solutions for Class 6 Science Chapter 14 Water is a beneficial study component required for the students studying CBSE board Class 6 science.
School Connect Online provided NCERT Solution will help students get a comprehensive understanding of the concepts. Studying this chapter will help you in scoring good marks in your class 6 also important for the preparation of Olympiads.
Solution has detailed answers and explanations to the exercise questions provided in the NCERT class 6 science textbook.
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NCERT Solutions for Class 6 Science Chapter 14 Water
1. Fill up the blanks in the following:
(a) The process of changing of water into its vapour is called _________________.
Ans : evaporation
(b) The process of changing water vapour into water is called _________________.
Ans : condensation
(c) No rainfall for a year or more may lead to _________________ in that region.
Ans : drought
(d) Excessive rains may cause _________________.
Ans : 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.
Ans : condensation
(b) Steam rising from wet clothes while they are ironed.
Ans : evaporation
(c) Fog appearing on a cold winter morning.
Ans : condensation
(d) Blackboard dries up after wiping it.
Ans : evaporation
(e) Steam rising from a hot girdle when water is sprinkled on it.
Ans : evaporation
3. Which of the following statements are “true” ?
(a) Water vapour is present in air only during the monsoon.
Ans : False
(b) Water evaporates into air from oceans, rivers and lakes but not from the soil.
Ans : False
(c) The process of water changing into its vapour, is called evaporation.
Ans : True
(d) The evaporation of water takes place only in sunlight.
Ans : False
(e) Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler.
Ans : True
4. Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help? If yes, how?
Ans :
Spreading uniform near an anghiti or heater will help because it increases the rate of evaporation due to heat.Higher the temperature faster is the rate of evaporation. So the uniform is dried up quickly.
5. Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a droplets of water around it. Why?
Ans :
The cooled water bottle has a very cold exposed surface. Due to the cool surface there is condensation of water-vapour from air on the surface of the water bottle because water vapour is present in the atmosphere. The condensed water molecules spread around the bottle. So a puddle of water is noticed after some time.
6. To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.
Ans :
The breath out gases contain water-vapour. The water-vapour condenses at spectacles so glass becomes wet and with the help of a small amount of water, it is easy to clean the spectacles.
7. How are clouds formed?
Ans :
The process of condensation plays an important role in bringing water back to the surface of the earth. As we go higher from the surface of the earth, it gets cooler. When the air moves up, it gets cooler and cooler. At sufficient heights, the air becomes so cool that the water vapor present in it condenses to form tiny drops of water called droplets. It is these tiny droplets that remain floating in the air and appear to us like clouds.
8. When does a drought occur?
Ans :
If there is no rain for a long period or for many years then there is scarcity of water in that region. This leads to drought.
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