Explanation

The transfer of thermal energy from one substance to another that requires no physical medium is called radiation.

Radiation is the process by which thermal energy (heat) is transferred through electromagnetic waves, such as infrared radiation. 

They can occur in a vacuum, such as in the transfer of heat from the Sun to the Earth.

Unlike conduction and convection, which require a physical medium (solids, liquids, or gases), 

Explanation

Plasma, the liquid component of blood, is composed of approximately 90% water.

This high water content helps transport nutrients, hormones, and waste products throughout the body.

Explanation

An epidemic is derived from Greek epi meaning upon or above and demos meaning people.

An epidemic occurs when a large number of people in a specific area and time experience a sudden outbreak of a disease, exceeding normal expectations.

Explanation

The magnetic materials include cobalt, iron, and nickel.

Plastic cannot be magnetized nor can it be attracted to a magnet.

Explanation

The process of taking air into the lungs is known as inspiration or inhalation, and the process of breathing it out is expiration or exhalation.

Air is inhaled through the mouth or the nose.

The sequence of air passage during inhalation is as follows:

Nostrils→pharynx→larynx→trachea→alveoli

Explanation

The cell is the basic structural, functional, and biological unit of all living organisms, including animals and humans.

It is the smallest unit of life that can replicate independently.

Explanation

Brittle materials are those that break easily under stress.

Explanation

Thermal energy is produced during fission reactions in nuclear reactors, which is used to generate electricity.

Explanation

An isthmus is a narrow strip connecting two larger land masses and separating two bodies of water.

Explanation

The term "cosmic" pertains to the universe, space, and celestial phenomena.