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International Olympiad of Science - iOS’ 22 CLASS 3rd SAMPLE QUESTIONS The Actual Question Paper Contains 30 Questions. The Duration of the Test Paper is 40 Minutes. 1. What will happen in the given condition shown in the I. Q represents bed rock and lies below top soil. figure below? II. R represents top soil and is rich in minerals and humus. III. P represents sub soil and contains maximum amount of humus in it. IV. Q represents bed rock and is hard, non-porous in the inner side. (A) I and II (B) II and III (C) II and IV (D) III and IV 4. In mountain regions, terrace farming is done to control which one of the following natural phenomena? (A) Freezing of water (B) Condensation of water (C) Evaporation of water (D) Both (A) and (B) 2. Which of the following activities can conserve (A) Deposition (B) Soil erosion environment? (C) Photosynthesis (D) All of these 5. A student takes a balloon and fills it with air. What will (A) Deforestation he notice? (A) He will notice that the mass of the balloon remains same. (B) Throwing garbage in rivers (B) He will notice that the mass of the balloon is increased. (C) He will notice that the mass of the balloon is (C) Afforestation decreased. (D) He will notice that the mass of the balloon is decreased by ½ of the initial mass of the balloon. (D) Pollution from factories 6. The following are the properties of a liquid. 1. It is tasteless. 3. Which one of the following statements is correct for 2. It exists in all three forms on earth. the given diagram? 3. It boils at 100°C. 4. It freezes at 0°C. R 5. It is colourless, odourless. Which one of the following liquids has the given P properties? (A) Acid (B) Lemon juice Q (C) Water (D) All of these 4
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International Olympiad of Science - iOS’ 22 7. Producers are called autotrophs and consumers are 9. Plants not only give us oxygen but also absorb called heterotrophs. Categorized the following as poisonous______. autotrophs and heterotrophs: (A) Water Mango tree, Lion, Cactus, Pine, Man (B) Carbon dioxide (A) Autotrophs : Mango tree, Cactus, Man, Heterotrophs (C) Oil : Lion, Pine (B) Autotrophs : Mango tree, Cactus, Pine, Heterotrophs (D) All of these : Lion, Man 10. Consider the following statements: (C) Autotrophs : Lion, Cactus, Man, Heterotrophs : Micky: Some plants grow in warmer climate of the plains Mango tree, Pine and shed most of their leaves in autumn. (D) Autotrophs : Mango tree, Pine, Man, Heterotrophs Donald: Tea and coffee are evergreen plants. : Lion, Cactus Goofy: Babul and kikar grow near sea coast and have breathing roots. 8. The bird shown below has which type of beak? Who is correct? (A) Only Micky (B) Both Micky and Donald (C) Micky, Donald and Goofy (D) Both Donald and Goofy (A) Chisel-shaped (B) Horny (C) Soft (D) Broad and flat ANSWERS 1. (C) 2. (C) 3. (C) 4. (B) 5. (B) 6. (C) 7. (B) 8. (B) 9. (B) 10. (B) 5
