We have compiled the NCERT MCQ Questions for Class 6 Science Chapter 14 Water with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 6 Science with Answers on a daily basis and score well in exams. Refer to the Water Class 6 MCQs Questions with Answers here along with a detailed explanation.
Water Class 6 MCQs Questions with Answers
Choose the correct option.
Question 1.
How much percentage of water does a human body contains?
(a) 60%
(b) 70%
(c) 80%
(d) 90%
Answer
Answer: (b) 70%
Question 2.
Water is used for
(a) bathing
(b) cooking
(c) drinking
(d) all of these
Answer
Answer: (d) all of these
Question 3.
The water in oceans cannot be used because
(a) it is salty
(b) it is harmful
(c) it is toxic
(d) it is acidic
Answer
Answer: (a) it is salty
Question 4.
Which of the following are the sources of water?
(a) Rivers
(b) Ponds
(c) Lakes
(d) All of these
Answer
Answer: (d) All of these
Question 5.
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
Answer
Answer: (b) spring
Question 6.
Which of the following is the largest source of water?
(a) Sea
(b) Ocean
(c) Pond
(d) Lake
Answer
Answer: (b) Ocean
Question 7.
Potable water is
(a) ocean water
(b) groundwater
(c) river water
(d) pond water
Answer
Answer: (b) groundwater
Question 8.
Which is not a part of water cycle?
(a) Cloud formation
(b) Rain
(c) Drinking by animals
(d) Sun
Answer
Answer: (c) Drinking by animals
Question 9.
Which one of the following is a purest form of water?
(a) River water
(b) Groundwater
(c) Rainwater
(d) Ocean water
Answer
Answer: (c) Rainwater
Question 10.
The process of conversion of water into vapours is called
(a) transpiration
(b) evaporation
(c) condensation
(d) none of these
Answer
Answer: (b) evaporation
Question 11.
The process by which plants lose water is
(a) photosynthesis
(b) translocation
(c) transpiration
(d) transportation
Answer
Answer: (c) transpiration
Question 12.
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
Answer
Answer: (a) 50 litres per person per day
Question 13.
Boiling point of water is
(a) 100°C
(b) 99°C
(c) 101°C
(d) 102°C
Answer
Answer: (a) 100°C
Question 14.
The water which had escaped from the earth as vapour returns to the earth in the form of
(a) precipitation
(b) evaporation
(c) infiltration
(d) condensation
Answer
Answer: (a) precipitation
Question 15.
Heavy rains may cause
(a) floods
(b) drought
(c) rainlessness
(d) both (a) and (c)
Answer
Answer: (a) floods
Question 16.
Which is a result of condensation of water vapours?
(a) Rain
(b) Snowfall
(c) Hail
(d) Tiny water droplets
Answer
Answer: (d) Tiny water droplets
Question 17.
When we step out from an air-conditioned car, on a humid day, our spectacles becomes misty and we cannot see anything clearly. This happens due to a process known as
(a) Decantation
(b) evaporation
(c) precipitation
(d) condensation
Answer
Answer: (d) condensation
Question 18.
The process by which plants lose water is
(a) photosynthesis
(b) translocation
(c) transpiration
(d) transportation
Answer
Answer: (c) transpiration
Question 19.
The process of conversion of water into its vapour is called
(a) transpiration
(b) evaporation
(c) condensation
(d) None of the above
Answer
Answer: (b) evaporation
Question 20.
Which of the following is the most impure form of natural water?
(a) Lake water
(b) Pond water
(c) Ground water
(d) Sea water
Answer
Answer: (d) Sea water
Question 21.
In which of the following does condensation of water vapour take place?
A. Breathing on to a mirror
B. Heating an open beaker in water
C. Leaving a glass of ice on the table
D. Leaving a cup of water by the window
(a) A and B
(b) B and C
(c) A and C
(d) C and D
Answer
Answer: (c) A and C
Question 22.
In how many states of matter does water exist?
(a) One
(b) Two
(c) Three
(d) Four
Answer
Answer: (c) Three
Question 23.
The clothes dry in the sunlight by the process of
(a) condensation
(b) evaporation
(c) drought
(d) transpiration
Answer
Answer: (b) evaporation
Question 24.
Which of these is responsible for the formation of clouds?
(a) Conservation
(b) Respiration
(c) Transpiration
(d) None of these
Answer
Answer: (c) Transpiration
Question 25.
Drought causes water
(a) profitability
(b) scarcity
(c) both (a) and (b)
(d) none of these
Answer
Answer: (b) scarcity
Question 26.
The colour of potable water is
(a) colourless
(b) milky
(c) pink-coloured
(d) red-coloured
Answer
Answer: (a) colourless
Question 27.
Evaporation of water is due to the heat of the
(a) sun
(b) moon
(c) star
(d) none
Answer
Answer: (a) sun
Fill in the blanks with suitable word/s.
Question 1.
More than ……………. of the earth’s surface is covered with water.
Answer
Answer: two-thirds
Question 2.
……………. is needed for drinking, bathing, washing our clothes and many more functions.
Answer
Answer: Water
Question 3.
About ……………. of the total earth’s water is available for use.
Answer
Answer: 0.01%
Question 4.
“Catch water where it falls” is the basic idea behind ……………. harvesting.
Answer
Answer: rainwater
Question 5.
The rivers get their water from the melting of snow lying on the peaks of snow mountains called …………….
Answer
Answer: glaciers
Question 6.
Region below the ground which is saturated with water is known as …………….
Answer
Answer: water table
Question 7.
The water cycle is also known as …………….
Answer
Answer: hydrologic cycle
Question 8.
Ice, water and ……………. are the three states of same material.
Answer
Answer: gas
Question 9.
Water is considered as ……………. resource on the earth.
Answer
Answer: renewable
Question 10.
Water vapours get continuously added to atmosphere due to evaporation and …………….
Answer
Answer: transpiration
Question 11.
The process of conversion of vapours into liquid is known as …………….
Answer
Answer: condensation
Question 12.
Falling of rain is also called …………….
Answer
Answer: precipitation
Question 13.
Water drops present on grass during winter morning is called …………….
Answer
Answer: dew
Question 14.
Ocean act as a ……………. for large number of plants and animals.
Answer
Answer: habitat
Question 15.
Lack of rain causes …………….
Answer
Answer: drought
Question 16.
Water vapour gets added to air by ………………… and transpiration.
Answer
Answer: evaporation
Question 17.
The circulation of water between ocean and land is known as the …………………
Answer
Answer: water cycle
Question 18.
………………… covers more than two- thirds of the earth’s surface.
Answer
Answer: Water
Question 19.
In atmosphere, water is present in huge quantities as …………………
Answer
Answer: water vapours
Question 20.
Water present in oceans and seas is ………………… for drinking.
Answer
Answer: unfit
Question 21.
Excess of rain may cause …………………
Answer
Answer: flood
Question 22.
Lack of rainfall for a long period of time causes …………………
Answer
Answer: drought
Question 23.
Dew is found on leaves of grass on ………………… mornings.
Answer
Answer: winter
Question 24.
Water cycle helps in regulating the ………………… on the earth.
Answer
Answer: weather
Question 25.
Tiny drops of water are called ………………… of water.
Answer
Answer: droplets
True or False
Question 1.
Ice is a gaseous form of water.
Answer
Answer: False
Question 2.
Water is also present below the surface of earth.
Answer
Answer: True
Question 3.
The process by which rainwater changes into snow is called condensation.
Answer
Answer: False
Question 4.
Sea water is saline.
Answer
Answer: True
Question 5.
Oceans are the major sources of fresh water.
Answer
Answer: False
Question 6.
Clouds are the mixture of opaque gases.
Answer
Answer: False
Question 7.
All animals and plants contain large amount of water.
Answer
Answer: True
Question 8.
The process of condensation is the reverse of transpiration.
Answer
Answer: True
Question 9.
Condensation near the surface of earth results in fog.
Answer
Answer: True
Question 10.
Lack of rain causes flood.
Answer
Answer: False
Question 11.
Vapourisation takes place only in presence of sunlight.
Answer
Answer: False
Question 12.
In cold countries, people use water to keep their houses warm.
Answer
Answer: True
Question 13.
Deep underground water is generally safe for drinking and cooking.
Answer
Answer: True
Question 14.
The highly salty water of an ocean is converted into pure water in nature by adding chlorine.
Answer
Answer: False
Question 15.
Our body contains 98% water.
Answer
Answer: False
Question 16.
Water evaporates faster on a hot summer day as compared to a cloudy day.
Answer
Answer: True
Question 17.
Excessive rain in an area leads to droughts.
Answer
Answer: False
Question 18.
Water is a natural resource.
Answer
Answer: True
Question 19.
About one-third of the Earth is covered with water.
Answer
Answer: False
Question 20.
Heating is essential to convert water into its vapour.
Answer
Answer: True
Question 21.
About 70% of the earth is covered with fresh water.
Answer
Answer: False
Question 22.
Sea water is saline.
Answer
Answer: True
Question 23.
Water vapour enters the air due to the process of evaporation.
Answer
Answer: True
Question 24.
We should conserve water for future.
Answer
Answer: True
Question 25.
Sunlight is essential to convert water into its vapour.
Answer
Answer: True
Match the following
| Column I | Column II |
| 1. Ice | (a) Due to lack of rain |
| 2. Oceans | (b) Due to excess of rain |
| 3. Drought | (c) The solid form of water |
| 4. Flood | (d) Sources of saline water |
| 5. Purest form of water | (e) Present in human beings |
| 6. 70% water | (f) Are covered with ice |
| 7. 90% water | (g) Rainwater |
| 8. Poles | (h) Present in tomatoes |
| 9. Water cycle | (i) Formed during winters |
| 10. Dew | (j) Continuous movement of water in Earth’s atmosphere |
Answer
Answer:
| Column I | Column II |
| 1. Ice | (c) The solid form of water |
| 2. Oceans | (d) Sources of saline water |
| 3. Drought | (a) Due to lack of rain |
| 4. Flood | (b) Due to excess of rain |
| 5. Purest form of water | (g) Rainwater |
| 6. 70% water | (e) Present in human beings |
| 7. 90% water | (h) Present in tomatoes |
| 8. Poles | (f) Are covered with ice |
| 9. Water cycle | (j) Continuous movement of water in Earth’s atmosphere |
| 10. Dew | (i) Formed during winters |
| Column A | Column B |
| 1. Rainwater | (a) Hand pump |
| 2. Water cycle | (b) Winter morning |
| 3. Groundwater | (c) Monsoon season |
| 4. Dew on leaves or grass | (d) Water released by plants |
| 5. Transpiration | (e) Circulation of water |
Answer
Answer:
| Column A | Column B |
| 1. Rainwater | (c) Monsoon season |
| 2. Water cycle | (e) Circulation of water |
| 3. Groundwater | (a) Hand pump |
| 4. Dew on leaves or grass | (b) Winter morning |
| 5. Transpiration | (d) Water released by plants |
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