6th Grade > Chemistry
WATER MCQs
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1 Mark each
(a) Clouds get water from land and water is present in them in theliquid form.
(b) Plants get water from the soil and water is present in them in the liquid form.
(c) Mountain tops get water from theatmosphere and water is present in them in the solid form i.e., ice.
(d) Aquifers get water from rainand water is present in them in the liquid form.
(e) Animals get water from water bodies and water is present in them in the liquid form.
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A
A large amount of water evaporates and gets converted into water vapour. The hot air rises up carrying water vapour along with it. As the air rises, the water vapour undergoes condensation and results in the formation of water droplets.
These water droplets combine together to form clouds. Once these clouds get heavy, they fall on the surface of the earth in the form of rain.
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C
Fog formed during winter morning and deposition of water dropson theouter surface of cold water glass are both due to condensation of water vapour present in the air.
Steam rising from wet clothes while they are ironed is due to evaporation of water.
Evaporation is also responsible for drying up of clothes kept near a heater and drying of lakes during summer.
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B
If it does not rain enough in a region, the soil continues to lose water by evaporation,transpiration, etc and the groundwater level keeps dropping. As the soil becomes dry, it is no more possible to draw underground water through pumps and wells.This results inascarcity of water for general use and agriculture. Such a situation in which aregion has a scaricty of water is called drought.
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B
Some amount of water vapour is always present in the atmosphere. The abundance is, however, much higher during monsoon. Hence, the given statement is false.
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B
The amount of water on the earth remains almost constant due to the water cycle. The water cycle is a natural continuous process due to which water is circulated from oceans and other water bodies to the atmosphere due to evaporation. The water vapours then undergo condensation and form clouds. Then the water re-enters theland in the form of rain (precipitation), and also flows back to oceans through rivers. This cycle keeps fresh water available for use of all living beings.
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We draw water from rivers, springs, ponds, wells or hand pumps. These are all sources of freshwater.
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Process of drying clothes : 1 Mark
Fate of water : 1 Mark
Name of the process : 1 Mark
We dry our clothes by spreading them on a clothes line in an open area preferably where it gets ample sunlight.
When wet clothes are placed for drying, water changes into vapour as a result of heating. The water vapour so formed becomes a part of the air and cannot usually be seen. This process is called evaporation.
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Definition: 1 Mark
Occurrence: 2 Mark
Drought is considered as a deficiency in rainfall or precipitation over an extended period, usually a season or more, resulting in a water shortage causing adverse impacts on vegetation, animals and people.
If it does not rain for a longer period of time then (1) the water level in rivers, lakes and ponds go down, some of them may even dry up. (2) The groundwater also becomes scarce and drops drastically. This may lead to drought.
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Clouds are made up of droplets of water. Normally clouds are thin and allow a large portion of the light to pass through them so they appear white. Rain clouds have large water drops which do not allow light to pass through them. This is the reason the clouds turn dark before it rains.