CSS General Knowledge MCQs

Atmospheric pressure decreases with altitude.
Lower pressure allows water to boil at a lower temperature.

Sound begins with vibrating matter.
It travels through a medium as pressure variations.

Boiling water is cooler at high altitude.
The lower cooking temperature slows many cooking processes.

Sound requires particles to transmit vibrations.
A vacuum contains too few particles for sound propagation.

Thermal radiation travels as electromagnetic waves.
It does not require a material medium.

Pressure inside the cooker increases above atmospheric pressure.
Water then boils at a higher temperature and cooks food faster.

Pitch rises as vibration frequency increases.
Low frequencies produce lower-pitched sounds.

Space between the Sun and Earth is nearly a vacuum.
Solar energy reaches Earth as electromagnetic radiation.

Visible light is part of the electromagnetic spectrum.
It can travel through a vacuum.

Greater wave amplitude carries more energy.
It is generally perceived as a louder sound.

Wood and many plastics conduct heat poorly.
They reduce heat transfer to the user's hand.

Non-luminous objects become visible when illuminated.
Reflected light enters the eyes and forms an image.