Everyday Science

Joseph Lister pioneered antiseptic surgery in 1865 by introducing the use of carbolic acid to sterilize surgical instruments and clean wounds, drastically reducing infections.

A transmission channel is the medium that carries the signal from the source to the destination, enabling communication between devices. The transmitter sends the signal, and the receiver receives it, but the medium itself is the transmission channel.

The study of aging is called Gerontology, which focuses on the biological, psychological, and social aspects of aging. The other options are unrelated or misspelled terms.

Jupiter, Saturn, Uranus, and Neptune are called Jovian planets because they are gas giants with thick atmospheres, unlike the rocky terrestrial planets like Earth and Mars.

Jonas Salk developed the first effective polio vaccine in the early 1950s, which significantly reduced polio incidence worldwide. The other options are unrelated to the polio vaccine discovery.

Michael Faraday is credited with inventing the electric motor in the early 1820s by demonstrating electromagnetic rotation, which laid the foundation for electric motor technology.

Lockjaw, or difficulty in opening the mouth, is a classic symptom of tetanus, caused by a bacterial toxin affecting the nervous system. The other options do not typically present with lockjaw.

The term 'atom' was first coined by the ancient Greek philosopher Democritus, who proposed that matter is composed of indivisible particles called atoms. This is historically accurate and well-established in science history.

Cadmium is a stable, non-radioactive element, whereas thorium, radium, and uranium are all naturally radioactive elements. Therefore, cadmium is the correct answer as it is not radioactive.

The cover of a capsule is typically made of gelatin, which is a common material used to form the outer shell of capsules in pharmaceuticals and supplements. This material is preferred because it is digestible and can encapsulate the contents securely.