Science Mcqs for Educator

The most important stimulant in tea leaves is	Brucine	Caffeine	Phenylalanine	Theine
Dolly is the name of the	First coined sheep	First coined monkey	First test-tube baby	First human fossil
Which part of the camera is analogue to the retina in the human eye?	Lens	Film	Aperture	Shutter
When a person enters a dark room from bright light he is not able to see clearly for a little while because the	Eye is unable to adjust itself immediately	Retina becomes insensitive momentarily	Iris is unable to dilate the pull immediately	Distance between the lens and retina take
What is the average adult pulse rate?	140-150	115-125	72-80	60
The beautiful color patterns exhibited by a peacock in its tail feathers are due to	Selective absorption of light	Selective reflection of light	Sinterference of light	Natural color pattern of feathers
A lake starts freezing because of the cold atmosphere. It will first freeze	All the bottom	In the middle part	At the top surface	Uniformly throughout the water body
The sun appears red at sunrise and sunset while it appears white at noon, because	Of refraction	It is cooler at sunrise and at sunset	Of diffraction leading to red end of the spectrum reaching the earth	Of scattering of light due to dust particles and air molecules
An astronaut inside a spacecraft is in a state of weightlessness. This implies that	The mass of the astronaut is reduced to zero	Gravity inside the spacecraft ceases to act	The astronaut is outside the influence of the earth’s gravitational force	The astronaut and the spacecraft are both in a free-falling state
An iceberg is floating in sea. How much of its mass will remain above the surface of water?	One tenth	One fifth	One fourth	One third
Most of the ozone In the atmosphere is con-cent rated in the	Mesosphere	Troposphere	Stratosphere	Ionosphere
The cow’s milk contains how much amount of water in terms of percentage?	60%	65%	72%	80%
T.V transmission cannot cover a very large area because	The strength of T.V waves is very limited	Picture cannot be transmitted clearly after a specific distance	The shape of the earth is spherical	The air is not a good conductor of light and sound/waves
The Green House Effect is caused Buy an ex-cess of	Carbon dioxide	Carbon monoxide	Carbon tetrachloride	None of above
Bats can also fly in dark because they are ca-pable of taking the help of	Ultraviolet waves	Ultrasonic waves	Electromagnetic waves	Special Titian
What is stealth Technology?	A device which when attached to an air-craft makes it invisible on the radar	A coating which reduces the visibility of an aircraft on a radar	A technology by which it is possible for the aircrafts to spy in the enemy air-space	A technology by using which paratroopers can be dropped stealthily behind the en-emy columns.
The rear view mirror of a motor vehicle is	Concave	Plane	Convex	Biconcave
Lead ball fall through water more slowly than through air because	The value of ‘g’ is less in water	Density of air is less than that of water	Of the viscous force in water	Of the surface tension of water
A Fahrenheit thermometer indicates a tempera-true of 14 F its corresponding reading on the Celsius scale will be	-20 C	-10 C	+10 C	+20 C