Achiever Section provides the practice papers for the National Science Olympiad (NSO) for Class 8 in this article.
There are 15 important Science Olympiad for class 8 questions covered in this article. Throughout this practice paper, you will encounter a variety of questions covering different branches of science, including biology, chemistry, physics, and Earth sciences.
practice paper for class 8
1. Which of the following produces least friction?
(a) Sliding friction
(b) Rolling friction
(c) Composite friction
(d) Static friction
2. The voice box is also called as
(a) stomach
(b) heart
(c) larynx
(d) mouth
3. Pitch of sound is determined by its
(a) frequency
(b) speed
(c) amplitude
(d) loudness
4. Which of the following is a bad conductor of electricity?
(a) Silver nitrate
(b) Sulphuric acid
(c) Distilled water
(d) Copper sulphate
5. Which of the following is a good conductor?
(a) Cotton
(b) Plastic
(c) Brick
(d) Steel
6. The process of loosening of the soil is called
(a) harvesting
(b) tilling
(c) spraying
(d) weeding
7. The chemical substances rich in nutrients are called
(a) pesticides
(b) weedicide
(c) fertiliser
(d) herbicides
8. The soil matter formed by decayed organic matter is called
(a) humus
(b) fertilizer
(c) biocide
(d) pesticide
9. What is the other name for artificial silk?
(a) Nylon
(b) Acrylic
(c) Polyester
(d) Rayon
10. Petroleum is mainly a mixture of which one of the following class?
(a) Carbohydrates
(b) Carbogens
(c) Hydrocarbons
(d) Alcohols
11. Which one of the following is a petrochemical?
(a) Ammonia
(b) Paraffin wax
(c) Coke
(d) Acetone
12. Which one of the following gases is used in combustion?
(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Hydrogen
13. Which zone represents the partial combustion in candle flame?
(a) Outer zone
(b) Inner zone
(c) Lower zone
(d) Middle zone
14. Materials having qualities of both metals and non-metals are
(a) noble metals
(b) alloys
(c) metalloids
(d) none of these
15. The cell formed after fertilisation is called
(a) embryo
(b) zygote
(c) foetus
(d) egg
ANSWER KEY
1.(b)
2.(c)
3.(a)
4.(c)
5.(d)
6.(b)
7.(c)
8.(a)
9.(d)
10.(c)
11.(b)
12.(a)
13.(d)
14.(C)
15.(b)
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