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Free download in PDF CBSE Class 6 Science MCQs & Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE class 6 Students.
81
Removal of water from plant bodies in the form of vapours is called _______.
[A]
Photosynthesis
[B]
Respiration
[C]
Transpiration
[D]
Condensation
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
83
Clothes dry faster when there is ______ water vapour in air.
[A]
less
[B]
more
[C]
either less or more
[D]
none of these
84
Which gas present in atmosphere allows substances to burn?
[A]
Nitrogen
[B]
Carbon Dioxide
[C]
Oxygen
[D]
Ozone
85
A gas is colourless, odourless, heavier than air and extinguishes fire. Name the gas?
[A]
Nitrogen
[B]
Carbon Dioxide
[C]
Hydrogen
[D]
Oxygen
86
Which gas is produced by plants during photosynthesis?
[A]
Nitrogen
[B]
Carbon Dioxide
[C]
Hydrogen
[D]
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
89
Which one of the following has the major part in air?
[A]
Nitrogen
[B]
Oxygen
[C]
Carbon Dioxide
[D]
Helium
90
The blanket of gases that surrounds the earth is called __________.
[A]
air
[B]
atmosphere
[C]
lithosphere
[D]
biospehere
91
Which of the following is the purest form of water?
[A]
rainwater
[B]
sea water
[C]
lake water
[D]
river water
92
The water fit for drinking is called _______.
[A]
river water
[B]
groundwater
[C]
rainwater
[D]
potable 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
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
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
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
98
The process of changing water into ice is called __________.
[A]
sublimation
[B]
evaporation
[C]
freezing
[D]
precipitation
99
Which of the following is a natural magnet?
[A]
Iron
[B]
Magnetite
[C]
Nickel
[D]
Cobalt
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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