The fifth state of matter is: 4) Plasma . However, there might be confusion here because while plasma is a recognized state of matter, the fifth state often refers to Bose-Einstein Condensate . The states of matter are generally categorized as solid, liquid, gas, plasma, and Bose-Einstein Condensate.
Bose-Einstein Condensate was first produced by: 4) Both 1 and 2 . Eric Cornell and Carl Wieman created the first Bose-Einstein Condensate in a laboratory setting in 1995. They cooled a gas of rubidium atoms to a fraction of a degree above absolute zero, which led the atoms to merge into a single quantum state.
The process by which a solid changes to liquid by absorbing heat is called: 3) Melting . When a substance melts, it absorbs heat energy. This energy increases the movement of the molecules or atoms within the solid until they overcome the forces keeping them in a fixed structure, allowing them to flow past one another as a liquid.