Everyday Science MCQs

Page No. 109

The primary function of the feathers in birds is to _________?


aProvide insulation for preserving body heat


bProvide striking surface to the wings for flying


cMake the body surface waterproof


dimpart coloration for species as well as sex recognition



What is ‘Stealth Technology‘?


aA device which when attached to an aircraft makes it invisible on the radar


bA coating which reduces the visibility of an aircraft on radar


cA Technology by which it is possible for the aircraft’s to spy in the enemy air-space


dA technology by using which paratroopers can be dropped stealthily behind the enemy columns.



Bats can also fly in dark because they are capable of taking the help of _________?


aUltraviolet Waves


bUltrasonic Waves


cElectromagnetic Waves


dSpecial Retina


View Answer Ultrasonic Waves

The Green House Effect is caused by an excess of ?


aCarbon dioxide


bCarbon monoxide


cCarbon tetrachloride


dNone of the above


View Answer Carbon dioxide

T.V. transmission cannot cover a very large area because


athe strength of T.V. waves is very limited


bpicture cannot be transmitted clearly after a specific distance


cthe shape of the earth is spherical


dthe air is not a good conductor of light and sound/waves



The cow’s milk contains how much amount of water in terms of percentage?


a60%


b65%


c72%


d80%


View Answer 80%

An iceberg is floating in sea. How much of its mass will remain above the surface of water?


aOne tenth


bOne fifth


cOne fourth


dOne third


View Answer One tenth

An astronaut inside a spacecraft is in a state of weightlessness. This implies that?


aThe mass of the astronaut is reduced to zero


bGravity inside the spacecraft ceases to act


cThe astronaut is outside the influence of the earth’s gravitational force


dThe astronaut and the spacecraft are both in a free-failing state



The sun appears red at sunrise and sunset while it appears white at noon, because


aOf refraction


bIt is cooler at sunrise and at sunset


cOf diffraction leading to red end of the spectrum reaching the earth.


dOf Scattering of light due to dust particles and air molecules.



A lake starts freezing because of the cold atmosphere. It will first freeze


aAt the bottom


bln the middle pan


cAt the top surface


dUniformly throughout the water body


View Answer At the top surface

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