CBSE Class 6 Science Water MCQs

Question. For which of these diseases is NO vaccination available?
a. Polio
b. Tetanus
c. Measles
d. Diarrhoea

Answer : D

Question. Sahil poured EQUAL AMOUNTS of water into three containers as shown in the figure and kept them all out in the hot sun for an entire day.  At the end of the day he measured the amount of water left in each container. What CAN Sahil test with this information?

a. whether evaporation depends on the volume of water taken
b. whether evaporation depends on the temperature of the surroundings
c. whether evaporation depends on the material of the container
d. whether evaporation depends on the exposed area of the water

Answer : D

Question. If diarrhoea spreads rapidly through your town, which of these precautions should you start taking immediately?
a. cover your nose while going out
b. drink only clean, boiled water
c. cover open buckets of water
d. spray insecticides in the garden

Answer : B

Question. See the water-cycle shown alongside. What is the difference between the water vapour that evaporates from rivers (P) and the water that evaporates from the sea (Q)?

a. A
b. B
c. C
d. D

Answer : D

Question. The apparatus used for purifying water using a method called 'distillation' is shown below. 
Impure water is boiled and the steam formed is passed through a chamber. Why is cold water also passed through this chamber?

a. The cold water removes the impurities.
b. The cold water helps the steam condense.
c. The cold water helps the water evaporate.
d. The cold water dissolves the steam.

Answer : B

Question. Which of these options contains processes involving change of state from LIQUID to GAS?
a. evaporation and sublimation
b. evaporation and respiration
c. respiration and transpiration
d. evaporation and transpiration

Answer : D

Question. Sprinkling a little salt on ice helps to melt the ice. Shakun has three glasses of water with him. Glasses A and C have pure water and Glass B has salt water. He puts glasses A and B into the freezer and leaves C outside. Which of these will take the least time to freeze?
a. Glass A
b. Glass B
c. Both glasses A and C will freeze at the same time.
d. Glass C

Answer : A

Question. The annual rainfall of many leading Indian cities is given in the map below:
Which of these cities is likely to have the heaviest rainfall?

a. Mumbai
b. Kolkata
c. Delhi
d. Chennai

Answer : A

Question. In a certain locality, flooding occurs if the total rainfall over a three-day period exceeds 40 mm. How many times would flooding have occurred in the locality during the entire week?
a. Never
b. Once
c. Twice
d. Thrice

Answer : B

Question. What is the total approximate rainfall for the week?
a. 50 mm
b. 60 mm
c. 70 mm
d. 80 mm

Answer : D

Question. In water, where do fish get the oxygen they need to breathe?
a. Fish do not need to breathe oxygen.
b. Each water molecule (H2O) consists of an oxygen atom which fish breathe.
c. Fish come up to the surface of the water from time to time to breathe.
d. There is oxygen gas dissolved in the water which fish breathe.

Answer : D

Question. Shyam is running in the rain. In which way should he hold the umbrella so that he does not get wet?

Answer : B

Question. Observe this figure carefully. From which of the positions shown below will a person see a rainbow?

a. A
b. B
c. C
d. D

Answer : A

Question. When placed in salt water, an egg gets completely immersed but does not sink to the bottom (see figure).
Now three tablespoons of salt are added and the water is gently stirred. Which of these may be the NEW position of the egg?

Answer : A

Question. Four people use four different methods to heat water for bathing. Who among the four uses a non-conventional energy source?

a. Vishu
b. Sheel
c. Nithai
d. Mohan

Answer : A

Question. Most of the rain water goes into 
a. Lakes and ponds 
b. Transpiration and evaporation 
c.  The ground water 
d. Rivers and sea 

Answer : C

Question. The circulation of water between ocean and land is a continuous process known as _____ 
a. Transpiration 
b. Evaporation 
c.  Raining 
d. Water cycle 

Answer : D

Question. Rise in water level of rivers leads to 
a. Flood 
b. Drought 
c.  Water scarcity 
d. Dry lands  

Answer : A

Question. One way of increasing the availability of water is to collect rainwater and store it for later use. This is called ___________ 
a. Rain water catching 
b. Rain water harvesting 
c.  Catching water 
d. Water collection in catchment areas  

Answer : B

Question. Fog appearing on a cold winter morning and Blackboard dries up after wiping it is due to:
a. Evaporation and condensation respectively 
b. Condensation  and evaporation respectively 
c.  Neither Evaporation nor condensation 
d. both Evaporation and condensation  

Answer : B

Question. Water vapour condenses to form tiny droplets of water in the upper layers of air where it is cooler. These droplets fall down as: 
a. Rain 
b. Storm 
c.  Cyclone 
d. Drought  

Answer : A

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  

Answer : D

Question. Water from the wet clothes disappears due to ________ 
a. Condensation 
b. Evaporation 
c.  Moisture 
d. Sun 

Answer : B

Question. Which of the following is not a source of potable water: 
a. Well 
b. River 
c.  Lake 
d. Sea 

Answer : D

Question.  A glass containing ice has water droplets around it. What conclusion can be drawn 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 glass and settles outside.

Answer : B

Answer Key