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Free download in PDF CBSE Class 8 Science MCQs & Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE class 8 Students.
81
Part of earth which supports the biodiversity is called
[A]
Biosphere
[B]
Sanctuary
[C]
Ecosystem reserve
[D]
Biotic community
82
Sanctuary is a place where
[A]
Animals are protected
[B]
Plants are protected
[C]
Office of forest department
[D]
None of these
Answer: Animals are protected
83
Project Tiger was launched on
[A]
1 april 1973
[B]
23 may 1973
[C]
21 September 1973
[D]
25 December 1973
84
The places where animals receive protection is called
[A]
Zoo
[B]
National aparks
[C]
Rock shelters
[D]
None of these
85
Fauna indicates for
[A]
Plants
[B]
Animals
[C]
Both plants and animals
[D]
None of these
Answer: Both plants and animals
86
The growing more and more of plants is called
[A]
Deforestation
[B]
Afforestation
[C]
Reforestation
[D]
None of these
87
The species which are at the verge of the extinction
[A]
Endemic
[B]
Extinct
[C]
Endangered
[D]
None of these
88
Deforestation takes place by
[A]
Human activities
[B]
Only by natural resources
[C]
Both of these
[D]
None of these
89
Cutting of trees on large scale is called
[A]
Deforestation
[B]
Reforestation
[C]
Afforestation
[D]
None of these
90
A place in environment where an organism lives is ________
[A]
Home
[B]
Resort
[C]
Habitat
[D]
Reservoir
91
Noise pollution is harmful for
[A]
Human
[B]
Cat
[C]
Bird
[D]
All
92
Sound propagates maximum in
[A]
Gas
[B]
Liquid
[C]
Solid
[D]
All
93
Voice box or larynx of human process
[A]
Sound
[B]
Wind
[C]
Loudness
[D]
None
94
To an fro motion of an object is called
[A]
Waves
[B]
Amplitude
[C]
Vibration
[D]
All of the above
95
Sound is kind of
[A]
Work
[B]
Energy
[C]
Force
[D]
None
96
The pitch of sound depends on
[A]
frequency
[B]
amplitude
[C]
both of these
[D]
none of these
97
Large amplitude of sound vibrations will produce:
[A]
Loud sound
[B]
Meak sound
[C]
Slow sound
[D]
Shreak
98
The voice box is called:
[A]
Stomach
[B]
Heart
[C]
Larynx
[D]
Mouth
99
The hearing range of human ear is
[A]
20 Hz to 20,000 Hz
[B]
Less than20 Hz
[C]
More than 20,000 Hz
[D]
20 Hz to 25,000 Hz
Answer: 20 Hz to 20,000 Hz
100
Eardrum is a part of
[A]
Sound producing organ
[B]
Skeletal system
[C]
Hearing organ
[D]
Reproductive organ
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