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CBSE Class 6 Science Quiz | CBSE Class 6 Science MCQs & Answers

Questions
81 Removal of water from plant bodies in the form of vapours is called _______.
A Photosynthesis
B Respiration
C Transpiration
D Condensation

Answer: Transpiration
82 Hot air balloon rises up in the air because?
A hot air is heavier than cold air
B hot air is lighter than cold air
C hot air does not play any role in rising up the balloon.
D hot air contains water vapours which push up the balloon.

Answer: hot air is lighter than cold air
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83 Clothes dry faster when there is ______ water vapour in air.
A less
B more
C either less or more
D none of these

Answer: less
84 Which gas present in atmosphere allows substances to burn?
A Nitrogen
B Carbon Dioxide
C Oxygen
D Ozone

Answer: Oxygen
85 A gas is colourless, odourless, heavier than air and extinguishes fire. Name the gas?
A Nitrogen
B Carbon Dioxide
C Hydrogen
D Oxygen

Answer: Carbon Dioxide
86 Which gas is produced by plants during photosynthesis?
A Nitrogen
B Carbon Dioxide
C Hydrogen
D Oxygen

Answer: Oxygen
87 Which one of the following statement is TRUE?
A Air is opaque.
B Air is made of one substance only.
C Air contains water vapour.
D Air contains large amount of inert gases.

Answer: Air contains water vapour.
88 Identify the gas "Odourless, Colourless, Heavier than air, supports combustion"
A Nitrogen
B Oxygen
C Carbon Dioxide
D Water vapours

Answer: Oxygen
89 Which one of the following has the major part in air?
A Nitrogen
B Oxygen
C Carbon Dioxide
D Helium

Answer: Nitrogen
90 The blanket of gases that surrounds the earth is called __________.
A air
B atmosphere
C lithosphere
D biospehere

Answer: atmosphere
91 Which of the following is the purest form of water?
A rainwater
B sea water
C lake water
D river water

Answer: lake water
92 The water fit for drinking is called _______.
A river water
B groundwater
C rainwater
D potable water

Answer: river water
93 Water freezes at ____ to a solid-state called snow or ice.
A 0°C
B 10°C
C 25°C
D 100°C

Answer: 25°C
94 The circulation of water between ocean and land is known as the _______.
A oxygen cycle
B water cycle
C nitrogen cycle
D none of these

Answer: oxygen cycle
95 When ice water is poured into a glass, tiny water droplets of water appear on the outside of glass due to _________.
A condensation
B evaporation
C sublimation
D transpiration

Answer: condensation
96 Which of the following will lead to a reduction in the availability of groundwater?
A plantation
B rainwater harvesting
C constructing more lakes
D building concrete roads

Answer: building concrete roads
97 The process of falling down of water in the form of rain, snow or hail is called _________.
A precipitation
B sublimation
C evaporation
D condensation

Answer: precipitation
98 The process of changing water into ice is called __________.
A sublimation
B evaporation
C freezing
D precipitation

Answer: freezing
99 Which of the following is a natural magnet?
A Iron
B Magnetite
C Nickel
D Cobalt

Answer: Magnetite
100 Which of the following action will NOT make a magnet loose its magnetic properties?
A Drop a magnet from height
B Hammer a magnet
C Pass Electric current from a current
D Heat a magnet

Answer: Pass Electric current from a current

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