NCERT Class 6 Science – Water Chapter 14 Question Answer for Preparation of Exams. Here we Provide Class 6 Vigyan Question Answer, Important Questions, for Various State Boards Students like CBSE, Haryana, uttar pradesh, mp and other state students.
Also Read : – Class 6 Science NCERT Solution
NCERT Class 6 Science Chapter 14 Water Textual Question Answer Solution.
Water Class 6 Science Chapter 14 Question Answer
Textual Questions and Answer for Easy to Understand the Chapter of Science.
Q. 1. Fill up the blanks in the following:
(a) The process of changing of water into its vapour 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 that region.
(d) Excessive rains may cause ….. .
Ans. (a) evaporation (b) condensation (c) drought (d) floods.
Q. 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.
Ans. (a) Due to cold water, the surface of glass cools and when water vapours come in contact with it, they condense to form tiny droplets. So, drops of water are seen on glass surface.
(b) When wet clothes are ironed, the water present in clothes evaporates due to heat and rises up in the air.
(c) In cold winter mornings, when water vapours comes in contact with vegetation or soil, they condense in the form of fog.
(d) The water vapours evaporate and blackboard dries up.
(e) When water is sprinkled over a hot girdle, it quickly changes into vapours.
Q. 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 oceans, rivers and lakes but not from the 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 the upper layers of air where it is cooler.
Ans. Only (c) and (e) are true statements.
Q. 4. Suppose you want to dry your school uniform quickly. Would spreading it near an angithi or heater help ? If yes, how ?
Ans. Yes, we can dry our school uniform by spreading it near heater or angithi because when we spread our school uniform near angithi or heater, the evaporation of water will be fast due to heat and cloth will dry up.
Q. 5. Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why ?
Ans. When cooled bottle of water is kept on a table, the surrounded air becomes cool and condense to form tiny droplets.
So, puddle of water found around it after some time.
Q. 6. To clean their spectacles people often breathe out on glasses to make them wet. Explain why the glasses become wet.
Ans. When we breathe on the spectacles, water vapours come out from our breath and they condense into water droplets when they come in contact with glass and glasses become wet.
Q. 7. How are clouds formed ?
Ans. Formation of clouds :- The water gets evaporated from the surface of seas and oceans and form water vapours, as air go higher from the surface of the earth, it gets cooler. At greater heights, the air becomes so cool that the water vapours present in it condense to form small water droplets. These small droplets of water remain floating in air and appear as clouds.
Q. 8. When does a drought occur ?
Ans. Drought :- When it does not rain for many years, then a drought occurs. The water also get lost by evaporation and transpiration. Soil dries up, ground water also reduces. The level of water also decreases in ponds and wells.