Class 6 Science MCQ Water

Question : How much percentage of water does a human body contains?

(a) 60%
(b) 70%
(c) 80%
(d) 90%

Question : Envelop of air around the earth is called

(a) Atmosphere
(b) Food chain
(c) Biosphere
(d) Ecosystem

Question : Which one is the purest form of water?

(a) River water
(b) Groundwater
(c) Rainwater
(d) Ocean water

Question : Fog appearing on a cold winter morning and Blackboard dries up afterwiping it is due to:

(a) Evaporation and condensation respectively
(b) Condensation and evaporation respectively
(c) Neither Evaporation nor condensation
(d) both Evaporation and condensation

Question : Water vapour condenses to form tiny droplets of water in the upper layersof air where it is cooler. These droplets fall down as:

(a) Rain
(b) Storm
(c) Cyclone
(d) Drought

Question : Which of the following is not a source by which water in rivers, lakes,ponds, wells and soil is replenished:

(a) Rain
(b) Hail
(c) Snow
(d) Evaporation

Question : Water from the wet clothes disappears due to ________

(a) Condensation
(b) Evaporation
(c) Moisture
(d) Sun

Question : Which of the following is not a source of potable water:

(a) Well
(b) River
(c) Lake
(d) Sea

Question : A glass containing ice has water droplets around it. What conclusion can bedrawn from this

(a) The water from the ice has settled outside the glass
(b) There is water in the air which has got condensed around the glass
(c) The glass is sweating
(d) The glass of ice is not so strong hence water goes through the glassand settles outside.

Question : Which is not a part of water cycle?

(a) Cloud formation
(b) Rain
(c) Drinking by animals
(d) Sun

Question : Where water in taps comes from:

(a) River
(b) Wells
(c) Lake
(d) All of these

Question : Of the total amount of water present on the earth, the water available for human use is about

(a) 20%
(b) 2%
(c) 1%
(d) 10%

Question : Boiling point of water is

(a) 100°C
(c) 101°C
(b) 99°C
(d) 102°C

Question : Plants loose water into air as water vapour through the process of:

(a) Evaporation
(b) Transpiration
(c) Condensation
(d) None of these

Question : Potable water is

(a) ocean water
(b) groundwater
(c) river water
(d) pond water

Question : How can we conserve water ?

(a) By avoiding wastage
(b) By more plantation
(c) By using carefully
(d) All of these

Question : The water in oceans cannot be used because

(a) it is salty
(b) it is harmful
(c) it is toxic
(d) it is acidic

Question : Which one is a renewable natural source?

(a) Water
(b) Coal
(c) Forest
(d) Petrol

Question : Most of the rain water goes into

(a) Lakes and ponds
(b) Transpiration and evaporation
(c) The ground water
(d) Rivers and sea

Question : The circulation of water between ocean and land is a continuous processknown as _____

(a) Transpiration
(b) Evaporation
(c) Raining
(d) Water cycle

Question : Rise in water level of rivers leads to

(a) Flood
(b) Drought
(c) Water scarcity
(d) Dry lands

Question : One way of increasing the availability of water is to collect rainwater andstore it for later use. This is called ___________

(a) Rain water catching
(b) Rain water harvesting
(c) Catching water
(d) Water collection in catchment areas

Question : Out of these, which is not a source of surface water?

(a) rain water
(b) river and lake water
(c) Spring water
(d) sea water

Question : Blackboard dries up after wiping it:

(a) Condensation
(b) Evaporation
(c) Distillation
(d) Filtration

Question : The place where underground water comes out on the surface of earth on its own is called

(a) rainwater
(b) spring
(c) sea level
(d) glacier

Question : The purest form of water is

(a) Rain water
(b) Subsoil water
(c) Spring water
(d) Hand pump water

Question : Gaseous form of water is called:

(a) Evaporation
(b) Water cycle
(c) Water vapour
(d) Floods

Question : The process of conversion of water into vapours is called

(a) transpiration
(b) evaporation
(c) condensation
(d) none of these

Question : Why do you feel cool after you start sweating?

(a) Evaporation of water droplets
(b) Condensation of water droplets
(c) Freezing of water droplets
(d) Solidification of salts in the water droplets

Question : The process of water vapour changing into water droplets is:

(a) Evaporation
(b) Water harvesting
(c) Water cycle
(d) Condensation

Question : The amount of water recommended by the UN for drinking, washing, cooking and maintaining proper hygiene is

(a) 50 litres per person per day
(b) 60 litres per person per day
(c) 70 litres per person per day
(d) 80 litres per person per day

Question : What is the main source of water for inland lakes?

(a) Snow
(b) Sea water
(c) Ground water
(d) Springs

Question :The percentage of water in potato is

(a) 88
(b) 75
(c) 90
(d) 95