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WorksheetsScience
Total questions: 15
Worksheet time: 8mins
Air contains how much percentage of Nitrogen?
78
21
1
Air contains how much percentage of Oxygen ?
2
1
21
79
Thich process is this?
Filtration
Decantation
Sedimentation
What is the used by plants for photosynthesis?
Carbon dioxide
Carbon monoxide
Oxygen
Decantation will happen after
Filtration
Sedimentation
Solid
Decantation will happen after
Filtration
Sedimentation
Solid
Alum is used in which process
Decantation
Filtration
Sedimentation
If an object is present at a distance of 5km from the surface of the Earth, it is present in
Troposphere
Stratosphere
Mesosphere
Thermosphere
Space shuttle orbits in this region
Thermosphere
Exosphere
Why should we use CNG in vehicles?
We should use CNG because to make the environment clean.
We should use CNG because to make the environment polluted .
What are the two pollution free gas
LPG and CNG
LGP and CNP
Petrol and Diesel
Water collected by __________ is the purest form of water.
Sedimentation
Decantation
Chlorination
Distillation
What is the function of Alum in loading process?
Alum increases the rate of sedimentation in the loading process.
Alum decreases the rate of sedimentation in the loading process.
We cannot feel air but we can see it.
True
False
Air is found
In holes only
In empty place
Everywhere
