Everyday Science MCQs

Spontaneous heat transfer occurs from higher to lower temperature.
It continues until thermal equilibrium is approached.

At boiling, vapor bubbles form throughout the liquid.
It occurs when vapor pressure matches external pressure.

Sunlight travels through more atmosphere near the horizon.
Much of the shorter-wavelength light is scattered away.

Water exerts an upward buoyant force on immersed objects.
Floating occurs when this force balances the object's weight.

Conduction transfers thermal energy through particle interactions.
It is especially important in solids.

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.

Archimedes' principle relates buoyant force to displaced fluid.
The upward force equals the weight of the displaced fluid.

Convection occurs when warmer fluid moves and cooler fluid replaces it.
It happens in liquids and gases.

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.

A ship contains large air-filled spaces.
Its total mass spread over its volume gives an average density below water.