CBSE Class 8 Science Quiz | CBSE Class 8 Science Objective Type Questions & Answers

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Questions
21 The shape of the airplane is like a
A Bird
B Dog
C Car
D none of these

Answer: Bird
22 Rolling friction is smaller than?
A Sliding friction
B Static friction
C Fluid friction
D All of the above

Answer: All of the above
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23 Lubricants ________
A Increase friction
B Reduce friction
C Both (a) and (b)
D None

Answer: Reduce friction
24 Friction is a /an_______
A Evil
B Foe
C Both (a) and (b)
D None

Answer: Both (a) and (b)
25 On what force of friction depends?
A Smoothness of surface
B Roughness of surface
C Inclination of surface
D All of above

Answer: All of above
26 Fluid are____
A Gases
B Liquids
C Gases and liquids both
D None of these

Answer: Gases and liquids both
27 What kind of substances are known as lubricants
A Increase friction
B Decrease friction
C Increase or decrease friction
D None of these

Answer: Decrease friction
28 Friction is a __________
A Contact force
B Non-contact force
C Magnetic force
D None of these

Answer: Contact force
29 Which one of these characteristics does a smooth surface has?
A Less frictional force
B More frictional force
C Sometimes less and sometimes more force
D All of above

Answer: Less frictional force
30 Complete the sentence. Friction always ____________
A helps the motion
B opposes the motion
C both of these
D none of these

Answer: opposes the motion
31 Microorganisms are
A Unicellular
B Multi-cellular
C Both
D None of these

Answer: Multi-cellular
32 Penicillium is a
A Algae
B Fungus
C Bacteria
D Yeast

Answer: Fungus
33 Malaria Is caused by
A Protozoa
B Virus
C Algae
D Bacteria

Answer: Protozoa
34 Rhizobium becteria
A Help in digestion
B Help in nitrogen fixation
C Cause diseases
D All of the above

Answer: Help in nitrogen fixation
35 Scientist who discovered fermentation is
A Alexander Fleming
B Louis Pasteur
C John Mendal
D Edward Jenner

Answer: Louis Pasteur
36 Amoeba belongs to
A Algae
B Fungi
C Protozoa
D Virus

Answer: Protozoa
37 Mushroom belongs to
A Algae
B Virus
C Fungi
D None of these

Answer: Fungi
38 Amount of nitrogen in the atmosohere is
A 58%
B 68%
C 78%
D 88%

Answer: 78%
39 Vaccine for small pox is discorvered by
A Louis Pasteur
B Alexander Fleming
C Edward Jenner
D John Mendal

Answer: Edward Jenner
40 Spyrogyra is
A An algae
B A fungi
C A protozoa
D A bacteria

Answer: A fungi

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