http://www.lassp.cornell.edu/sethna/OrderParameters/Intro.html
The introduction: "As a kid in elementary school, I was taught that there were three states of matter: solid, liquid, and gas. The ancients thought that there were four: earth, water, air, and fire, which was considered sheer superstition. In junior high, I remember reading a book called The Seven States of Matter. At least one was ``plasma'', which made up stars and thus most of the universe, and which sounded rather like fire to me.
The original three, by now, have become multitudes. In important and precise ways, magnets are a distinct form of matter. Metals are different from insulators. Superconductors and superfluids are striking new states of matter. The liquid crystal in your wristwatch is one of a huge family of different liquid crystalline states of matter [1] (nematic, cholesteric, blue phase I, II, and blue fog, smectic A, B, C, C*, D, I, ...). There are over 200 qualitatively different types of crystals, not to mention the quasicrystals (figure 1). There are disordered states of matter like spin glasses, and states like the fractional quantum hall effect with excitations of charge e/3 (like quarks). Particle physicists tell us that the vacuum we live within has in the past been in quite different states: in the last vacuum but one, there were four different kinds of light [2] (mediated by what is now the photon, the W+, the W-, and the Z particle). We'll discuss this more in lecture two. "
You might check your notes, or ask for a restatement from your instructor --- intro chem isn't too likely a course to find concerns for such esoterica as has been already discussed in the other responses.
There is also "Seven Solid States," Walter J. Moore, among other texts from the sixties which highlight for the chemistry student the pitfalls of absolute statements that everything must be a solid, liquid, gas, blah-blah-blah. Are you certain that you were not asked to read and summarize something of this ilk?
