Olympiad Class 8 Science Mock Test Set G

Question. Which of the following planets can be seen with naked eyes?
(A) Mercury, Venus, Uranus, Jupiter
(B) Mars, Jupiter, Uranus, Neptune
(C) Mercury, Venus, Uranus, Pluto
(D) Mercury, Mars, Venus, Jupiter
Answer : D

Question. Which of the following applications use catalytic converters?
(A) Automobiles
(B) Wind mills
(C) Poultry farms
(D) Dairy farms
Answer : A

Question. In which of the following are plane mirrors arranged at an angle to get a number of coloured images?
(A) Periscope
(B) Kaleidoscope
(C) Telescope
(D) Thermoscope
Answer : B

Question. Which of the following describes the advantage of ploughing ?
(A) It allows the penetration of roots of plants.
(B) It helps in proper aeration and eradicates weeds.
(C) It promotes the growth of useful soil bacteria.
(D) All of the above.
Answer : D

Question. Which of the following fabrics is made by mixing two types of fibres?
(A) Cotton
(B) Polywool
(C) Rayon
(D) Nylon
Answer : B

Question. Earthquakes at two places M and N were measured as 2 and 4. How is the magnitude and their destructive energy at M and N related?
(A) Tremor at N is strong as that at place ‘M’.
(B) Tremor at N is four times stronger than that at place ‘M’.
(C) Tremor at N is 100 times stronger than that at place ‘M’.
(D) Tremor at N is 1000 times stronger than that at place ‘M’.
Answer : C

Question. Which of the following is an example of a liquid fuel?
(A) Paraffin wax
(B) Coal gas
(C) L.P.G.
(D) Alcohol
Answer : D

Question. Which of the following sac-like structures help in the synthesis and storage of many substances?
(A) Endoplasmic reticulum
(B) Nucleus
(C) Mitochondria
(D) Golgi bodies
Answer : D

Question. Which of the following is an insulator?
(A) Wood
(B) Iron
(C) Graphite
(D) Silver
Answer : A

Question. Which of the following is an example of a heavily cross linked polymer?
(A) Melamine
(B) Polythene
(C) Nylon
(D) Polyester
Answer : A

Question. Which of the following helps human beings in producing sounds?
(A) The eardrum
(B) The auditory nerve
(C) The optical cortex
(D) The vocal cords
Answer : D

Question. Which one of the following is called pond silk?
(A) Spirogyra
(B) Volvox
(C) Chlamydomonas
(D) Euglena
Answer : A

Question. Sudhakar’s bicycle was making a lot of squeaking noise. What should he do to stop the squeaking noise?
(A) Water
(B) Oil
(C) Sand
(D) Powder
Answer : B

Question. Which of the following is NOT a heavy metal?
(A) Cd
(B) Hg
(C) Pb
(D) K
Answer : D

Question. Which effect is caused by frictional force?
(A) Change in the shape of an object
(B) Change in the direction of the motion of an object
(C) Slowing down of a moving object
(D) Acceleration in a moving body
Answer : C

Question. What is the main aim of conserving living organisms?
(A) To increase the world’s population of organisms
(B) To prevent the extinction of endangered species
(C) To help the students of botany and zoology
(D) To help in ecotourism
Answer : B

Question. Which of the following statements is correct about galaxies?
(A) They move towards each other.
(B) They move away from each other.
(C) They do not move at all.
(D) They have fixed number of stars.
Answer : B

Question. Why is kerosene oil regarded more suitable than petrol in oil lamps?
(A) Kerosene is heavier.
(B) Kerosene is expensive.
(C) Kerosene is less volatile.
(D) Kerosene is more volatile.
Answer : C

Question. Which natural calamity cannot be predicted accurately in advance?
(A) Flood
(B) Cyclone
(C) Earthquake
(D) Famine
Answer : C

Question. Which of the following labelled stages grow within a case during development?

(A) P
(B) Q
(C) R
(D) S
Answer : C