Solid, liquid, gas ^^
For example, if you have an ice cube you have a solid piece of matter, but if you heat it up it melts and then it's liquid, and after getting hot enough it evaporates and even though you can't see it it's still there, but as a gas.
By the way, what's this have to do with Spanish?
Los inmigrantes mejoran las ganancias de los trabajadores norteamericanos.( Inmigrants make North American workers get a better profit.) There was barely any mention of Asians, and there was enough evidence to prove the second and last answers incorrect.
Answer:
1. ¿ De dónde son las galletas que me regalaste?
2. ¿ Quién es el padre de Silvia?
3. ¿ Quiénes son los tres estudiantes ganadores?
4. ¿ Por qué es tan caro este queso?
5. ¿ Cuanto tiempo necesitas?