What is the fourth state of matter? gas, liquid, solid, & ?

Answer 1

For your purposes, the answer is PLASMA.

Though technically there are many more states of matter...

Low-energy states:

Quantum Hall: A state that gives rise to quantized Hall voltage measured in the direction perpendicular to the current flow.

Quantum Spin Hall: a theoretical phase that may pave the way
for the development of electronic devices that dissipate less energy and generate less heat. This is a derivation of the Quantum Hall state of matter.

Bose-Einstein condensate: a phase in which a large number of bosons all inhabit the same quantum state, in effect becoming one single wave/particle.

Fermionic condensate: Similar to the Bose-Einstein condensate but composed of fermions. The Pauli exclusion principle prevents fermions from entering the same quantum state, but by pairing up two fermions can behave as a boson and the pairs can then enter the same quantum state without restrictions.

Supersolid: similar to a superfluid, a supersolid is able to move without friction but retains a rigid shape.

Superfluid: A phase achieved by a few cryogenic liquids at extreme temperature where they become able to flow without friction. A superfluid can flow up the side of an open container and down the outside. Placing a superfluid in a spinning container will result in quantized vortices.

Solid: A solid holds a rigid shape without a container.
Amorphous solid: A solid in which there is no long-range order of the positions of the atoms.
Amorphous glassy solid
Amorphous rubbery solid

Crystalline solid: A solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern.

Liquid: A mostly non-compressible fluid. Able to conform to the shape of its container but retaining a (nearly) constant volume independent of pressure.

Liquid crystal: Properties intermediate between liquids and crystals. Generally, able to flow like a liquid but exhibiting long-range order.

Gas: A compressible fluid. Not only will a gas conform to the shape of its container but it will expand to fill the container.

Supercritical fluid: At sufficiently high temperatures and pressures the distinction between liquid and gas disappears.

Colloid: A dispersion of a substance in another substance, where both are in any of the solid, liquid or gaseous phases. The properties of the containing substance will tend to predominate.

Plasma: A gas in which electrons can become free of their atoms resulting in a distribution of charges able to conduct electricity.

Degenerate matter: matter under very high pressure, supported by the Pauli exclusion principle

Electron-degenerate matter: found in the crust of white dwarf stars. Electrons remain bound to atoms but are able to transfer to adjacent atoms.

Neutronium: found in neutron stars. Vast gravitational pressure compresses atoms so hard the electrons are forced into the nucleus, resulting in a superdense conglomeration of neutrons. (Normally free neutrons outside an atomic nucleus, will decay with a half life of about 10.4 minutes, but in a neutron star, as in the nucleus of an atom, other effects stabilize the neutrons.)

Strange matter: Also known as quark matter, it may exist inside some particularly large neutron stars.


Very high energy states:

Quark-gluon plasma: A phase in which quarks become free and able to move independently (rather than being perpetually bound into particles) in a sea of gluons (subatomic particles that transmit the strong force that binds quarks together). May be briefly attainable in particle accelerators.

Weakly symmetric matter: for up to 10-12 seconds after the Big Bang the strong, weak and electromagnetic forces were unified.

Strongly symmetric matter: for up to 10-36 seconds after the Big Bang the energy density of the universe was so high that the four forces of nature — strong, weak, electromagnetic, and gravitational — were unified into one single force. As the universe expanded, the temperature and density dropped and the strong force separated, a process called symmetry breaking.

Answer 2

Plasma

Answer 3

plasma...

It's a state that has both liquid and gas properties but is actually neither.

Answer 4

plasma

Answer 5

plasma

Answer 6

PLASMA !!!!