Heat is vibration generated by friction of one state of matter with another or with itself. Sound is vibration propagating through matter.
Other than these five states of matter, there is a state lower than all these states. It is the zero state of matter. The zero state of matter is known as the BEC or Bose-Einstein Condensate. It is the most condensed condensate of all matter.
This state of matter was discovered by the scientist called Bose. He shared his findings with Einstein who helped him to publish his work to the world. Their joint venture resulted in the newly discovered state of matter being known as the Bose-Einstein Condensate.
A BEC exists when matter is frozen to extremely low temperatures that are a tiny fraction of a degree above absolute zero.
In this state, the atoms overlap into each other to form a wave. The BEC is a matter wave. If the wave was compressed, it would form a singularity. If enough mass was condensed into the singularity it could turn into a black hole.
It is believed that the zero state of matter could lead to the development of flat space technology. In future, it might be possible to transport huge objects in very tiny spaces as long as they are not compressed beyond the critical mass which would result in a black hole.
The occurrence of a black hole while making BEC would not need to be too much of a concern anyway because it would require a tremendous amount of energy to compress mass into the critical point.
The zero state of matter, like the fifth state of matter, is also non-thermal. It does not emit heat as well since its particles are not in motion at all thereby not causing friction.
Some elements of each state of matter are able to exist at room temperature. There are room temperature plasmas and matter waves (dark matter).
Solids are basically objects, such as a rocks and humans. They have a definite volume and shape. They cannot be compressed as the molecules in a solid are very closely packed due to strong intermolecular forces that bonds the molecules together. They expand when heated and contract when cooled. When heated, the molecules vibrate the more and more vigorously in their places when the temperature increases.
Liquids are water-like matter, such as seawater and paint. They have a definite volume, however have no definite shape, as the intermolecular forces are not as strong as those in solids to bond the molecules together. Hence, the molecules will move around the container when tilted to reach a horizontal level (plane). They can be compressed, however only to a small extent. They expand when cooled (ice in solid state) and contract when heated (water vapour in gaseous state). The molecules will then become compacted or move further apart when in the respective states. The molecules will lose energy when steam condenses to water.
Gas is basically the air. The air is usually made up different kinds of gases, such as oxygen and carbon dioxide. However, they all share common characterisics. Gases do not have a definite volume and shape, thus able to fill up anything, such as the atmosphere. They can be compressed as the intermolecular forces are weak. The gas molecules are spaced far apart, and they move in a continuous and random motion. Their speed varies according to the temperature and the number of atoms. The higher the temperature or the less the atoms, the faster they move. They bounce away from any other molecules (gas, dust or smoke), thus have no fixed motion. This is called the Brownian Motion. Diffusion is greatly present, where the molecules will diffuse in the air till it reaches a state of equilibrium. Gas also expands greatly when heated and contracts greatly when cooled.
Plasma is the superheated phase were electrons get torn from the atom (ionization). It is the rarest phase of matter on earth although it is the most common in the universe. They can be natural (lightning and the Sun) or man-made (fluorescent light tubes).
Examples of Bose-Einstein Condensates are superconductors and superfluids. These are materials that are cooled till they almost reach absolute zero (0 K, -273.15 °C). Superconductors are materials (solids) that have no resistance to the flow of electricity, such as superconducting metals, alloys and compounds (alloy of Niobium and Titanium). They are extremely cooled they can repel a magnetic field. Superfluids are liquid gas, as water would be frozen by then, that have strange behaviours. Liquid helium, for example, is cooled till it can actually "creep" on the walls of a smaller container placed inside a larger container to enter and then form its own horizontal level, unlike the previously-mentioned characteristic of liquids! Superfluids are also able to trap light and slow its moving speed down, which is a great breakthrough.