Olympiad Class 9 Science Mock Test Set 03

Question. What kind of a planet is Jupiter?
(A) Terrestrial planet
(B) Gas planet
(C) Asteroid
(D) Hottest planet
Answer : B

Question. Which of the following does NOT cause air pollution?
(A) Increasing forest reserves
(B) Using pesticides in farms
(C) Developing housing estates
(D) Quarrying for limestone
Answer : A

Question. Which of the following occurs in persons suffering from myopia?
(A) The eye ball is shortened.
(B) Ciliary muscles contract.
(C) The eye ball elongates.
(D) The retina expands.
Answer : C

Question. Which of these processes involves the removal of chaff from grain?
(A) Weeding
(B) Threshing
(C) Harvesting
(D) Winnowing
Answer : D

Question. To which of the following does the 4R principle apply the most?
(A) Synthetic fibre
(B) Natural fibre
(C) Metal
(D) Plastic
Answer : D

Question. On what factors does the response of the rock to stress depend ?
(i) Its temperature
(ii) The speed of stress applied
(iii) The confining pressure on the rock
(A) Only (i) and (ii)
(B) Only (ii) and (iii)
(C) Only (i) and (iii)
(D) (i), (ii) and (iii)
Answer : D

Question. Where is kerosene mainly used?
(A) In laying down roads.
(B) As fuel in jet engines.
(C) In making water proof materials.
(D) In furnaces of industries.
Answer : B

Question. Which of the following structures regulate cell division in animal cells?
(A) Chromosomes
(B) Chromatin
(C) Centrosome
(D) Spindle fibrils
Answer : C

Question. Why are metals good conductors of electricity ?
(A) In metals, outer electrons are strongly bound to the atom.
(B) In metals, outer electrons are loosely bound to the atom.
(C) In metals, inner electrons are loosely bound to the atom.
(D) In metals, protons can detach from the nucleus and conduct electricity.
Answer : B

Question. Which of the following is made from coconut fibre?
(A) Sweaters
(B) Shoes
(C) Mattresses
(D) Sarees
Answer : C

Question. Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen. Why?
(A) The speed of sound is greater than the speed of light.
(B) The speed of sound is equal to the speed of light.
(C) The speed of light is greater than the speed of sound.
(D) All of the above
Answer : C

Question. Which of the following microorganisms causes common cold ?
(A) Bacteria
(B) Virus
(C) Protozoa
(D) Algae
Answer : B

Question. What type of a force is friction?
(A) Contact force
(B) Non-contact force
(C) Electrostatic force
(D) Magnetic force
Answer : A

Question. Identify the metal that does NOT react with HCl.
(A) Ag
(B) Mg
(C) Al
(D) Fe
Answer : A

Question. Why do deep sea divers use a special suit for diving?
(A) To maintain their body temperature in col dsea water
(B) To protect against sea animals
(C) To counter balance the pressure in the sea.
(D) To keep them dry
Answer : C

Question. Which of the following is/are factors that pose a great threat to biodiversity?
(A) Habitat destruction
(B) Disturbance and introduction of alien species
(C) Man’s interference with nature
(D) All of these
Answer : D

Question. Which of the following planets takes the maximum time to rotate around itself?
(A) Mercury
(B) Pluto
(C) Venus
(D) Neptune
Answer : C

Question. Which of the following is formed during the process of anaerobic fermentation?
(A) Biogas
(B) Natural gas
(C) Water gas
(D) Petroleum
Answer : A

Question. What is the lightning streaks that we see?
(A) UV rays from the sun
(B) Cosmic rays
(C) Accumulated electric charges
(D) IR rays from the sun
Answer : C

Question. Which of the following is called the larva of a frog?
(A) Nymph
(B) Tadpole
(C) Caterpillar
(D) Fry
Answer : B