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CBSE Class 8 Science Quiz | CBSE Class 8 Science MCQs & Answers

Questions
81 Part of earth which supports the biodiversity is called
A Biosphere
B Sanctuary
C Ecosystem reserve
D Biotic community

Answer: Biosphere
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
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83 Project Tiger was launched on
A 1 april 1973
B 23 may 1973
C 21 September 1973
D 25 December 1973

Answer: 1 april 1973
84 The places where animals receive protection is called
A Zoo
B National aparks
C Rock shelters
D None of these

Answer: Zoo
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

Answer: Afforestation
87 The species which are at the verge of the extinction
A Endemic
B Extinct
C Endangered
D None of these

Answer: Endangered
88 Deforestation takes place by
A Human activities
B Only by natural resources
C Both of these
D None of these

Answer: Both of these
89 Cutting of trees on large scale is called
A Deforestation
B Reforestation
C Afforestation
D None of these

Answer: Deforestation
90 A place in environment where an organism lives is ________
A Home
B Resort
C Habitat
D Reservoir

Answer: Habitat
91 Noise pollution is harmful for
A Human
B Cat
C Bird
D All

Answer: All
92 Sound propagates maximum in
A Gas
B Liquid
C Solid
D All

Answer: Solid
93 Voice box or larynx of human process
A Sound
B Wind
C Loudness
D None

Answer: Sound
94 To an fro motion of an object is called
A Waves
B Amplitude
C Vibration
D All of the above

Answer: Vibration
95 Sound is kind of
A Work
B Energy
C Force
D None

Answer: Energy
96 The pitch of sound depends on
A frequency
B amplitude
C both of these
D none of these

Answer: frequency
97 Large amplitude of sound vibrations will produce:
A Loud sound
B Meak sound
C Slow sound
D Shreak

Answer: Loud sound
98 The voice box is called:
A Stomach
B Heart
C Larynx
D Mouth

Answer: Larynx
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

Answer: Hearing organ

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