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Free download in PDF CBSE Class 8 Science Objective Type Questions with Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE class 8 Students.
121
The percentage of nitrogen is
[A]
21%
[B]
78%
[C]
12%
[D]
87%
122
Green House gas is
[A]
Nitrogen
[B]
Oxygen
[C]
Methane
[D]
Carbon dioxide
123
Air pollution causes
[A]
Global warming
[B]
Respiratory problems
[C]
Soil erosion
[D]
None of these
Answer: Respiratory problems
124
Most polluted river in the world is
[A]
Yamuna
[B]
Cavery
[C]
Chenab
[D]
Ganga
125
The Taj Mahal is being affected by
[A]
Noise pollution
[B]
Air pollution
[C]
Water pollution
[D]
None of these
126
Highest percentage of air consists of
[A]
Oxygen
[B]
Carbon dioxide
[C]
Nitrogen
[D]
Argon
127
Leaves or fruits fall on the ground due to
[A]
magnetic force
[B]
gravitational force
[C]
electrostatic force
[D]
muscular force
Answer: gravitational force
128
The force between two charged bodies is called
[A]
muscular force
[B]
gravitational force
[C]
magnetic force
[D]
electrostatic force
Answer: electrostatic force
129
The strength of force is expressed by?
[A]
weight
[B]
mass
[C]
magnitude
[D]
longitudinal force
130
What is force?
[A]
pull
[B]
push
[C]
push and push both
[D]
none of these
Answer: push and push both
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