Science Olympiad Practice Test 1 — NSO-style (Class 6)
A free Maths, Science, English and Reasoning Olympiads (IMO, NSO, IEO style) practice paper for Grade 6 in the format of the real test: 50 questions in 60 minutes, covering Logical Reasoning; Science; Achievers' Section. Logical Reasoning (10 questions) and Science (35 questions) carry 1 mark each; the Achievers' Section (5 questions) carries 3 marks each. Total 60 marks. The portal counts each answer once. Choose one answer (A–D) for each question and answer every question — there is no penalty for a wrong answer. Attempt it online — every question is marked instantly and the correct answers are shown at the end.
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Q1. Which number comes next in the series?
2, 6, 12, 20, 30, ?
Q2. In a certain code, FOREST is written as GPSFTU. How is PLANET written in the same code?
Q3. Pointing to a man, Sita said, 'His mother is the only daughter of my mother.' How is the man related to Sita?
Q4. Arun walks 10 m towards the north. He turns right and walks 6 m. He turns right again and walks 18 m. Then he turns right and walks 6 m. How far is he from his starting point, and in which direction?
Q5. Which is the odd one out?
Q6. In a class test, Tara is 9th from the top and 22nd from the bottom. No two students got the same marks. How many students are in the class?
Q7. A clock with hands but no numbers is seen in a plane mirror. The mirror image of the clock shows the time 3:40. What is the actual time?
Q8. How many triangles are there in the figure below?
Q9. Kidney is related to excretion in the same way as lungs are related to …
Q10. Which figure comes next in the series?
Q11. Which of the following is found in a plant cell but NOT in an animal cell?
Q12. Which of these is NOT shown by ALL living things?
Q13. Tiny pores on the surface of leaves through which gases pass in and out are called …
Q14. Which of these plants has fibrous roots?
Q15. After fertilisation, which part of a flower develops into a fruit?
Q16. Which feature helps a camel to live in a hot desert?
Q17. Which of these animals can breathe through its moist skin as well as through its lungs?
Q18. Which type of joint is found at the elbow?
Q19. The rib cage mainly protects the …
Q20. An earthworm has no bones. How does it move?
Q21. A few drops of dilute iodine solution are put on a food sample. The sample turns blue-black. The food contains …
Q22. In the test for protein, a food sample is mixed with water, copper sulphate solution and caustic soda solution. What shows that protein is present?
Q23. Rohan has swollen gums that bleed easily. His diet probably lacks …
Q24. Which of these materials is translucent?
Q25. Common salt is obtained from seawater mainly by …
Q26. Salt is added to water, stirring all the time, until no more salt dissolves at that temperature. The solution is now called …
Q27. Which of these changes can be reversed?
Q28. Before an iron rim is fitted onto a wooden cart wheel, the rim is heated. Why?
Q29. Which of these substances turns blue litmus paper red?
Q30. The to-and-fro motion of a child on a swing is an example of …
Q31. What is the length of the pencil shown on the ruler?
Q32. School bags are given wide straps. Why?
Q33. Which of these is a non-contact force?
Q34. Shadows are formed because light …
Q35. The image of a tree formed on the screen of a pinhole camera is …
Q36. Which of these is a luminous object?
Q37. Sound CANNOT travel through …
Q38. In which circuit will the bulb glow?
Q39. When a bar magnet is hung freely from a thread, it comes to rest pointing in the …
Q40. A steel spoon is kept in a cup of hot tea. After a while its handle becomes hot. Heat reaches the handle by …
Q41. The Pole Star appears almost fixed in the sky while other stars seem to move. Why?
Q42. Water vapour in the air cools high up and changes into tiny water droplets that form clouds. This process is called …
Q43. Which gas makes up about 78% of the air around us?
Q44. In the food chain Grass → Grasshopper → Frog → Snake → Eagle, the frog is a …
Q45. Which of these is a renewable source of energy?
Q46. Mira set up four dishes of bean seeds in the same dark cupboard at room temperature, except dish S, which she kept in a refrigerator.
P: seeds on dry cotton wool
Q: seeds on moist cotton wool
R: seeds kept fully under boiled and cooled water
S: seeds on moist cotton wool (in the refrigerator)
After four days, only the seeds in dish Q had sprouted. Which conclusion is best supported?
Q47. At 8 a.m., Meera stands on flat ground with her back to the Sun, so her shadow falls in front of her. Which direction is she facing, and what happens to the length of her shadow between 8 a.m. and 11 a.m.?
Q48. In the circuit shown, S1, S2 and S3 are switches, each of which can be open or closed. For which setting will the bulb glow?
Q49. In a field, the food chain is Grass → Grasshopper → Frog → Snake. A pesticide kills most of the frogs. What is most likely to happen soon after?
Q50. Karan has a mixture of common salt, sand and iron filings. Which order of steps will give him all three substances separately?
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