Science Quiz

7/21/2019 Science Quiz

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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 heat Cloth is a poor conductor of heat

(b) (b) Cloth is good conductor of heat Cloth is good conductor of heat (c) (c) External heat rays enter into theExternal heat rays enter into the

body through woolen clothes body through woolen clothes

(d) (d) None of above None 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 darknessbecause-because-(a) (a) It has squint eyes It has squint eyes

(b) It has large eyes with orbs(b) It has large eyes with orbsdirected forward, giving it binoculardirected forward, giving it binocularsight sight

(c) It has light bulbs in its eyes(c) It has light bulbs in its eyes provided by nature provided by nature

Ans. (b) Ans. (b)



Q.3 Stainless steel contains-Q.3 Stainless steel contains-

(a) Chromium,Nicel,Iron and(a) Chromium,Nicel,Iron andCarbon Carbon

(b) Nicel,Iron and Carbon (b) Nicel,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. The ma!imum limit ofQ. The ma!imum limit of

sound beyond which asound beyond which a

person can become deaf is- person can become deaf is-

Ans. (d) Ans. (d)

(a) !! db (a) !! db

(b) "! db (b) "! db

(c) #! db (c) #! db

(d) $%& db (d) $%& db 'oo Noisy 'oo Noi

sy



Q." Which #as often createsQ." Which #as often creates

more air- pollution$ more air- pollution$

Ans. (c) Ans. (c)

(a) (a) Nitrogen Nitrogen

(b) (b) Carbon dioideCarbon dioide(c) Carbon monoide (c) Carbon monoide

(d) *ygen (d) *ygen



Q.% &urin# cardiac failure'Q.% &urin# cardiac failure'

which of the followin# iswhich of the followin# is

ad(ised as a first aid$ ad(ised as a first aid$

Ans. (a) Ans. (a)

(a) (a) +outh of +outh resuscitation +outh of +outh resuscitation

(b) iving eternal cardiac +assage (b) iving eternal cardiac +assage

(c) iving cool water to drin (c) iving cool water to drin

(d) iving complete body +assage (d) iving complete body +assage



Q.) * wa(es cannot beQ.) * wa(es cannot be

transmitted throu#htransmitted throu#h

(acuum-(acuum-

(a) -ight (a) -ight

(b) eat (b) eat

(c) /ound (c) /ound

(d) 0lectromagnetic (d) 0lectromagnetic

Ans. (c) Ans. (c)



Q.+ The small bats can fly inQ.+ The small bats can fly in

dark because-dark because-

(a) (a) 'hey can see the ob1ects in'hey can see the ob1ects indarness darness

(b) 'hey have wea legs land are(b) 'hey have wea legs land areliely to be attaced byliely to be attaced by

predators predators

(c) 'hey generate flashes of light (c) 'hey generate flashes of light

(d) 'hey generate ultrasonic sound(d) 'hey generate ultrasonic soundwaves waves

Ans. d Ans. d



(a) (a) 2ecreases2ecreases

(b) Increases (b) Increases

(c) 3emains the same (c) 3emains the same

(d) Is 4ero (d) Is 4ero

Q., The time period of aQ., The time period of a

pendulum on moon- pendulum on moon-

Ans. (b) Ans. (b)



(a) (a) 5ater epands on free4ing 5ater epands on free4ing

(b) 6ottle contraits at fru4ing point (b) 6ottle contraits at fru4ing point

(c) 'emperature outside the bottle is(c) 'emperature outside the bottle is

ten than that iundeten than that iunde

(d) None of above (d) None of above

Q. 1 When water is filled inQ. 1 When water is filled in

a bottle and is allowed toa bottle and is allowed to

freee' the bottle because / freee' the bottle because /

Ans. (a) Ans. (a)



Q.11 Ice packed is sawQ.11 Ice packed is saw

dust does not meltdust does not melt

quickly. Why?quickly. Why?

Ans.Ans. /aw dust is a bad/aw dust is a bad

conductor of heat andconductor of heat and protects the ice from the protects the ice from theeternal heat and hence frometernal heat and hence from

melting away quicly.melting away quicly.



Q. 12 A boatman pushesQ. 12 A boatman pushes

the bank with his pole.the bank with his pole.Why?Why?

Ans.Ans. Action and reaction beingAction and reaction beingequal and opposite,the ban willequal and opposite,the ban will

push the boat away from it. push the boat away from it.



Q. 13 0 burnin# candle #etsQ. 13 0 burnin# candle #ets

e!tin#uished when co(erede!tin#uished when co(eredwith a tumbler. Why$ with a tumbler. Why$

Ans.Ans. A burning candle getsA burning candle getsetinguished when covered with aetinguished when covered with a

tumbler because the supply oftumbler because the supply ofoygen is cut 7 off and the flameoygen is cut 7 off and the flame

goes out. goes out.



Q.14 Why do you seeQ.14 Why do you see

rainbow after rain?rainbow after rain?

Ans.Ans. 'he water drops suspended'he water drops suspendedin the atmosphere act as prismin the atmosphere act as prismand disperse light into sevenand disperse light into sevencolours.colours.



Q1! A metal tea" pot hasQ1! A metal tea" pot has

an ebony handle. Why?an ebony handle. Why?

Ans.Ans. 0bony being bad conductor0bony being bad conductorof heat, the handle does not getof heat, the handle does not gethot.hot.



Q. 1% Why is it easier to roll aQ. 1% Why is it easier to roll a

barrel than to pull it alon#barrel than to pull it alon#the road$ the road$

Ans.Ans. In winter the water vapourIn winter the water vapourcontained in the breath condensescontained in the breath condensesinto small droplets of water, whichinto small droplets of water, whichbecome visible. In summer it isbecome visible. In summer it isnot so.not so.



Q. 1) Why is hot soup moreQ. 1) 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 theliquid now occupies more area.liquid now occupies more area.'hus the hot soup occupies more'hus 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 thecolder one.colder one.



Q. 1+ Why do the stars twinkle$ Q. 1+ Why do the stars twinkle$

Ans.Ans. 'he stars seem to twinle'he stars seem to twinle

due to two causes. 8irst the lightdue to two causes. 8irst the lightfrom the stars passes throughfrom the stars passes throughseveral mediums9 secondly .several mediums9 secondly .



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