Class 6 Science Chapter 14 Water Ncert Solutions are provided here. NCERT Intext and End Exercise questions of Class 6 Science Chapter 14 Water.
Class 6 Science Chapter 14 : Water
Water is the fourteenth chapter of NCERT Text book of Class 6 Science. The end exercise and intext questions are comprised of the topics – water, water usage, source of water , water cycle, Formation of Cloud , Oceans, Rain, Conservation of Water , Rainwater Harvesting , Water Vapour
Chapter 14 : Water ( Ncert Solutions)
|Class||6th – ( Class VI )|
|Chapter||Chapter 14 : Water|
|Study Material||NCERT intext and End Exercise Solutions|
|Total Questions||8 Questions|
|Text Book||NCERT Text Book|
NCERT Solutions Class 6 Science Chapter 14 : Water
Ques. 1 : Fill up the blanks in the following:
(a) The process of changing of water into its vapour is called _____.
The process of changing of water into its vapour is called Evaporation.
(b) The process of changing water vapour into water is called _____.
The process of changing water vapour into water is called Condensation .
(c) No rainfall for a year or more may lead to _____ in that region.
No rainfall for a year or more may lead to draught in that region.
(d) Excessive rains may cause _____.
Excessive rains may cause floods
Ques. 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. It is due to Condensation
(b) Steam rising from wet clothes while they are ironed.
Ans. It is due to evaporation.
(c) Fog appearing on a cold winter morning.
Ans. It is due to Condensation.
(d) Blackboard dries up after wiping it.
Ans. It is due to Evaporation.
(e) Steam rising from a hot girdle when water is sprinkled on it.
Ans. It is due to Evaporation.
Ques. 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 in the upper layers of air where it is cooler.
Ques. 4 : Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help? If yes, how?
Ans. Yes , spreading the school uniform (to dry it quickly ) near heater helps a lot. This is because the rate of evaporation increases with the increase in temperature.
So the rate of evaporation will be higher near an anghiti or heater and thus , the school uniform will dry up fast.
Ques. 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 very cold exposed surface. Due to the cooled 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 we see droplets of water around the cooled bottle.
Ques. 6 : To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.
Ans. When we breath out, water vapours present in the air contact with cold surface of glasses and condensed.
Therefore the glasses of spectacles become wet when people breath out on glasses.
Ques. 7 : How are clouds formed?
Ans. Formation of Clouds –
- The water present on the the earth evaporates due to heating by the sun.
- The water vapour in the air condenses to form droplets of water at high altitude, which appear as clouds.
- The clouds are formed by the condensation of the water vapours present in air at high altitude.
Ques. 8 : When does a drought occur?
Ans. If it does not rain in a region for a time period of one year or more than it, then the soil of the region continues to loose water by evaporation and transpiration.
Since this evaporated and transpirated water is not brought back to the region by rain, the soil becomes dry. The level of water in ponds and wells of the region goes down and some of them may even dry up.
The ground water may also become scarce. This may lead to drought.