Science MCQs

Chlorination disinfects water by adding chlorine.

An electric circuit is a closed path allowing electrons to flow.

A circuit breaker stops current flow during overload or short circuit.

Object color is determined by the wavelengths of light it reflects.

A compound has elements chemically bonded in fixed proportions.

Conductors permit the flow of heat or electricity.

Consumers obtain energy by eating other organisms.

Convection involves heat transfer via fluid movement.

Cosmic background radiation is remnant energy from the early universe.

At the critical angle light refracts at 90 degrees.