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

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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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