Everyday Science MCQs

O is the chemical symbol for oxygen.
Element symbols use one or two letters.

Litmus changes color depending on acidity or basicity.
Red litmus turns blue in bases, while blue litmus turns red in acids.

Alloys combine metals with other elements.
They are designed for strength, corrosion resistance, or other useful properties.

A sharp edge concentrates force over a small area.
This creates greater pressure and makes cutting easier.

Heat flows from a hotter body to a cooler body.
It is energy in transit rather than a material substance.

The highest-energy water molecules escape during evaporation.
This lowers the average energy and temperature of the skin.

Violet light has the shortest wavelength among visible colors.
It also has the highest visible-light frequency.

Pressure is measured in pascals.
One pascal equals one newton per square metre.

Temperature indicates how energetic particle motion is on average.
It determines the direction of heat flow.

Wind carries away water vapor near the fabric.
This maintains a concentration difference and speeds evaporation.

Rayleigh scattering is stronger for shorter visible wavelengths.
Scattered blue light reaches observers from many directions.

Pascal's law states that pressure applied to a confined fluid is transmitted equally.
This allows force multiplication in hydraulic brakes.