Everyday Science MCQs

Evaporation occurs at the surface of a liquid.
Higher temperature and moving air usually increase its rate.

The lens focuses incoming light onto the retina.
Photoreceptor cells then convert light into nerve signals.

Pressure is force distributed over an area.
The same force produces greater pressure on a smaller area.

A loudspeaker uses electrical signals to move a diaphragm.
The diaphragm produces sound waves in air.

Condensation occurs when gas particles lose energy.
Water vapor condenses into droplets on a cool surface.

Red light has the longest wavelength in the visible spectrum.
Violet has the shortest visible wavelength.

The kilogram is the SI base unit of mass.
Mass measures the amount of matter in an object.

The second is the SI base unit of time.
Larger time units are derived from it.

A thermometer measures temperature.
It may use liquid expansion, electronic sensors, or infrared radiation.

The joule is the SI unit of work and energy.
It equals the work done by a force of one newton over one metre.

Speed equals distance divided by time.
It describes how quickly an object moves.

Average speed is total distance divided by total time.
Thus, 120 ÷ 2 = 60 km/h.