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Science quiz

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raja kamal Ch
raja kamal Ch

This document contains 18 multiple choice questions with answers about various science topics such as heat conduction, owl vision, stainless steel composition, sound limits, air pollution sources, first aid for cardiac failure, light and sound wave transmission, bat echolocation, pendulum time periods, freezing water expansion, ice melting, boat propulsion, extinguished candles, rainbow formation, heat conduction of handles, barrel rolling, breath condensation, soup taste, and star twinkling. The questions cover physics, chemistry, biology and general science principles.

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Science quiz
Science quiz
Q. 1. Woolen Clothes protectQ. 1. Woolen Clothes protect the body from cold because-the body from cold because- (a)(a) Cloth is a poor conductor of heatCloth is a poor conductor of heat (b)(b) Cloth is good conductor of heatCloth is good conductor of heat (c)(c) External heat rays enter into theExternal heat rays enter into the body through woolen clothesbody through woolen clothes (d)(d) None of aboveNone of above Ans. (a)Ans. (a)
Q.2. The owl can see mostQ.2. The owl can see most clearly in total darknessclearly in total darkness because-because- (a)(a)It has squint eyesIt has squint eyes (b) It has large eyes with orbs(b) It has large eyes with orbs directed forward, giving it binoculardirected forward, giving it binocular sightsight (c) It has light bulbs in its eyes(c) It has light bulbs in its eyes provided by natureprovided by nature Ans. (b)Ans. (b)
Q.3 Stainless steel contains-Q.3 Stainless steel contains- (a) Chromium,Nickel,Iron and(a) Chromium,Nickel,Iron and CarbonCarbon (b) Nickel,Iron and Carbon(b) Nickel,Iron and Carbon (c) Iron and Carbon only(c) Iron and Carbon only (d) Chromium,Iron and Carbon(d) Chromium,Iron and Carbon Ans. (d)Ans. (d)
Q.4 The maximum limit ofQ.4 The maximum limit of sound beyond which asound beyond which a person can become deaf is-person can become deaf is- Ans. (d)Ans. (d) (a) 55 db(a) 55 db (b) 75 db(b) 75 db (c) 85 db(c) 85 db (d) 120 db(d) 120 db Too NoisyToo Noisy
Q.5 Which gas often createsQ.5 Which gas often creates more air- pollution?more air- pollution? Ans. (c)Ans. (c) (a)(a) NitrogenNitrogen (b)(b) Carbon dioxideCarbon dioxide (c) Carbon monoxide(c) Carbon monoxide (d) Oxygen(d) Oxygen
Q.6 During cardiac failure,Q.6 During cardiac failure, which of the following iswhich of the following is advised as a first aid?advised as a first aid? Ans. (a)Ans. (a) (a)(a)Mouth of Mouth resuscitationMouth of Mouth resuscitation (b) Giving external cardiac Massage(b) Giving external cardiac Massage (c) Giving cool water to drink(c) Giving cool water to drink (d) Giving complete body Massage(d) Giving complete body Massage
Q.7 waves cannot beQ.7 waves cannot be transmitted throughtransmitted through vacuum-vacuum- (a) Light(a) Light (b) Heat(b) Heat (c) Sound(c) Sound (d) Electromagnetic(d) Electromagnetic Ans. (c)Ans. (c)
Q.8 The small bats can fly inQ.8 The small bats can fly in dark because-dark because- (a)(a)They can see the objects inThey can see the objects in darknessdarkness (b) They have weak legs land are(b) They have weak legs land are likely to be attacked bylikely to be attacked by predatorspredators (c) They generate flashes of light(c) They generate flashes of light (d) They generate ultrasonic sound(d) They generate ultrasonic sound waveswaves Ans. (d)Ans. (d)
(a)(a)DecreasesDecreases (b) Increases(b) Increases (c) Remains the same(c) Remains the same (d) Is zero(d) Is zero Q.9 The time period of aQ.9 The time period of a pendulum on moon-pendulum on moon- Ans. (b)Ans. (b)
(a)(a)Water expands on freezingWater expands on freezing (b) Bottle contraits at fruzing point(b) Bottle contraits at fruzing point (c) Temperature outside the bottle is(c) Temperature outside the bottle is ten than that iundeten than that iunde (d) None of above(d) None of above Q. 10 When water is filled inQ. 10 When water is filled in a bottle and is allowed toa bottle and is allowed to freeze, the bottle because freeze, the bottle because Ans. (a)Ans. (a)
Q.11Icepackedis sawdustdoes notQ.11Icepackedis sawdustdoes not meltquickly. Why?meltquickly. Why? Ans.Ans. Saw dust is a badSaw dust is a bad conductor of heat andconductor of heat and protects the ice from theprotects the ice from the external heat and hence fromexternal heat and hence from melting away quickly.melting away quickly.
Q. 12Aboatmanpushes thebankQ. 12Aboatmanpushes thebank withhis pole. Why?withhis pole. Why? Ans.Ans. Action and reaction beingAction and reaction being equal and opposite,the bank willequal and opposite,the bank will push the boat away from it.push the boat away from it.
Q. 13 A burning candle getsQ. 13 A burning candle gets extinguished when coveredextinguished when covered with a tumbler. Why?with a tumbler. Why? Ans.Ans. A burning candle getsA burning candle gets extinguished when covered with aextinguished when covered with a tumbler because the supply oftumbler because the supply of oxygen is cut off and the flameoxygen is cut off and the flame goes out.goes out.
Q.14WhydoyouseerainbowafterQ.14Whydoyouseerainbowafter rain?rain? Ans.Ans. The water drops suspendedThe water drops suspended in the atmosphere act as prismin the atmosphere act as prism and disperse light into sevenand disperse light into seven colours.colours.
Q,15Ametaltea- pothas anebonyQ,15Ametaltea- pothas anebony handle. Why?handle. Why? Ans.Ans. Ebony being bad conductorEbony being bad conductor of heat, the handle does not getof heat, the handle does not get hot.hot.
Q. 16 Why is it easier to roll aQ. 16 Why is it easier to roll a barrel than to pull it alongbarrel than to pull it along the road?the road? Ans.Ans. In winter the water vapourIn winter the water vapour contained in the breath condensescontained in the breath condenses into small droplets of water, whichinto small droplets of water, which become visible. In summer it isbecome visible. In summer it is not so.not so.
Q. 17 Why is hot soup moreQ. 17 Why is hot soup more tasty than the colder one ?tasty than the colder one ? Ans.Ans. As temperature is increased,As temperature is increased, surface tension decreases and thesurface tension decreases and the liquid now occupies more area.liquid now occupies more area. Thus the hot soup occupies moreThus the hot soup occupies more area on the tongue and is,area on the tongue and is, therefore, more tasty than thetherefore, more tasty than the colder one.colder one.
Q. 18 Why do the stars twinkle?Q. 18 Why do the stars twinkle? Ans.Ans. The stars seem to twinkleThe stars seem to twinkle due to two causes. First the lightdue to two causes. First the light from the stars passes throughfrom the stars passes through several mediums; secondly .several mediums; secondly .
Science quiz

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Science quiz

  • 3. Q. 1. Woolen Clothes protectQ. 1. Woolen Clothes protect the body from cold because-the body from cold because- (a)(a) Cloth is a poor conductor of heatCloth is a poor conductor of heat (b)(b) Cloth is good conductor of heatCloth is good conductor of heat (c)(c) External heat rays enter into theExternal heat rays enter into the body through woolen clothesbody through woolen clothes (d)(d) None of aboveNone of above Ans. (a)Ans. (a)
  • 4. Q.2. The owl can see mostQ.2. The owl can see most clearly in total darknessclearly in total darkness because-because- (a)(a)It has squint eyesIt has squint eyes (b) It has large eyes with orbs(b) It has large eyes with orbs directed forward, giving it binoculardirected forward, giving it binocular sightsight (c) It has light bulbs in its eyes(c) It has light bulbs in its eyes provided by natureprovided by nature Ans. (b)Ans. (b)
  • 5. Q.3 Stainless steel contains-Q.3 Stainless steel contains- (a) Chromium,Nickel,Iron and(a) Chromium,Nickel,Iron and CarbonCarbon (b) Nickel,Iron and Carbon(b) Nickel,Iron and Carbon (c) Iron and Carbon only(c) Iron and Carbon only (d) Chromium,Iron and Carbon(d) Chromium,Iron and Carbon Ans. (d)Ans. (d)
  • 6. Q.4 The maximum limit ofQ.4 The maximum limit of sound beyond which asound beyond which a person can become deaf is-person can become deaf is- Ans. (d)Ans. (d) (a) 55 db(a) 55 db (b) 75 db(b) 75 db (c) 85 db(c) 85 db (d) 120 db(d) 120 db Too NoisyToo Noisy
  • 7. Q.5 Which gas often createsQ.5 Which gas often creates more air- pollution?more air- pollution? Ans. (c)Ans. (c) (a)(a) NitrogenNitrogen (b)(b) Carbon dioxideCarbon dioxide (c) Carbon monoxide(c) Carbon monoxide (d) Oxygen(d) Oxygen
  • 8. Q.6 During cardiac failure,Q.6 During cardiac failure, which of the following iswhich of the following is advised as a first aid?advised as a first aid? Ans. (a)Ans. (a) (a)(a)Mouth of Mouth resuscitationMouth of Mouth resuscitation (b) Giving external cardiac Massage(b) Giving external cardiac Massage (c) Giving cool water to drink(c) Giving cool water to drink (d) Giving complete body Massage(d) Giving complete body Massage
  • 9. Q.7 waves cannot beQ.7 waves cannot be transmitted throughtransmitted through vacuum-vacuum- (a) Light(a) Light (b) Heat(b) Heat (c) Sound(c) Sound (d) Electromagnetic(d) Electromagnetic Ans. (c)Ans. (c)
  • 10. Q.8 The small bats can fly inQ.8 The small bats can fly in dark because-dark because- (a)(a)They can see the objects inThey can see the objects in darknessdarkness (b) They have weak legs land are(b) They have weak legs land are likely to be attacked bylikely to be attacked by predatorspredators (c) They generate flashes of light(c) They generate flashes of light (d) They generate ultrasonic sound(d) They generate ultrasonic sound waveswaves Ans. (d)Ans. (d)
  • 11. (a)(a)DecreasesDecreases (b) Increases(b) Increases (c) Remains the same(c) Remains the same (d) Is zero(d) Is zero Q.9 The time period of aQ.9 The time period of a pendulum on moon-pendulum on moon- Ans. (b)Ans. (b)
  • 12. (a)(a)Water expands on freezingWater expands on freezing (b) Bottle contraits at fruzing point(b) Bottle contraits at fruzing point (c) Temperature outside the bottle is(c) Temperature outside the bottle is ten than that iundeten than that iunde (d) None of above(d) None of above Q. 10 When water is filled inQ. 10 When water is filled in a bottle and is allowed toa bottle and is allowed to freeze, the bottle because freeze, the bottle because Ans. (a)Ans. (a)
  • 13. Q.11Icepackedis sawdustdoes notQ.11Icepackedis sawdustdoes not meltquickly. Why?meltquickly. Why? Ans.Ans. Saw dust is a badSaw dust is a bad conductor of heat andconductor of heat and protects the ice from theprotects the ice from the external heat and hence fromexternal heat and hence from melting away quickly.melting away quickly.
  • 14. Q. 12Aboatmanpushes thebankQ. 12Aboatmanpushes thebank withhis pole. Why?withhis pole. Why? Ans.Ans. Action and reaction beingAction and reaction being equal and opposite,the bank willequal and opposite,the bank will push the boat away from it.push the boat away from it.
  • 15. Q. 13 A burning candle getsQ. 13 A burning candle gets extinguished when coveredextinguished when covered with a tumbler. Why?with a tumbler. Why? Ans.Ans. A burning candle getsA burning candle gets extinguished when covered with aextinguished when covered with a tumbler because the supply oftumbler because the supply of oxygen is cut off and the flameoxygen is cut off and the flame goes out.goes out.
  • 16. Q.14WhydoyouseerainbowafterQ.14Whydoyouseerainbowafter rain?rain? Ans.Ans. The water drops suspendedThe water drops suspended in the atmosphere act as prismin the atmosphere act as prism and disperse light into sevenand disperse light into seven colours.colours.
  • 17. Q,15Ametaltea- pothas anebonyQ,15Ametaltea- pothas anebony handle. Why?handle. Why? Ans.Ans. Ebony being bad conductorEbony being bad conductor of heat, the handle does not getof heat, the handle does not get hot.hot.
  • 18. Q. 16 Why is it easier to roll aQ. 16 Why is it easier to roll a barrel than to pull it alongbarrel than to pull it along the road?the road? Ans.Ans. In winter the water vapourIn winter the water vapour contained in the breath condensescontained in the breath condenses into small droplets of water, whichinto small droplets of water, which become visible. In summer it isbecome visible. In summer it is not so.not so.
  • 19. Q. 17 Why is hot soup moreQ. 17 Why is hot soup more tasty than the colder one ?tasty than the colder one ? Ans.Ans. As temperature is increased,As temperature is increased, surface tension decreases and thesurface tension decreases and the liquid now occupies more area.liquid now occupies more area. Thus the hot soup occupies moreThus the hot soup occupies more area on the tongue and is,area on the tongue and is, therefore, more tasty than thetherefore, more tasty than the colder one.colder one.
  • 20. Q. 18 Why do the stars twinkle?Q. 18 Why do the stars twinkle? Ans.Ans. The stars seem to twinkleThe stars seem to twinkle due to two causes. First the lightdue to two causes. First the light from the stars passes throughfrom the stars passes through several mediums; secondly .several mediums; secondly .