Common Observations

They have sharp eyesight

They can run very fast

They can hear ultrasonic waves

They are easily trainable

Silk

Cotton

Nylon

Terelene

Metal reflects radio waves

Spark plug creates electromagnetic disturbances

Passing vehicle affect the sophisticated T.V. components

None of these

High temperature

Low temperature

Low pressure outside the body

High pressure outside the body

Less than the weight of water displaced by you

Half of your normal weight

Zero

Equal to your normal weight

It is due to incandescence

It gives white light

It has more surface for distribution of energy

It is due to ionization of gases

Water is good conductor of heat

Water has very high specific heat capacity

Evaporation of water produces lot of cooling

None of these

Supply heat

Do not radiate heat

Prevent the heat of the body from escaping

None of these

It is quite for off

It does not have any living being

Its surface is not smooth

Root mean square velocity of all gases is more than their escape velocity on moon’s surface

They emit light intermittently

The star’s atmosphere absorbs light intermittently

The refractive index of the air in atmosphere fluctuates

The earth’s atmosphere absorbs light intermittently