Well, it all depends on what you are considering. You may be talking about the shell/body of the aeroplane which is solid, the fuel for instance which may be considered as liquid/gas, or the gas (air) inside the aircraft as gas
Solid.
gas
The four states of matter are commonly referred to as solid, liquid, gas and plasma.
All birds nests are a solid state of matter (not liquid, gas or plasma), constructed predominantly from solids (leaves, twigs, bark, etc) however, depending on the species of bird, the nest itself can be quite fragile and/or full of holes, so would not be considered "solid".
All 3.
In our usual experience, we only find water in all three phases, as solid, liquid, and gas. But almost any substance can exist in those phases, given the right temperature and pressure.
In chemistry, a physical change would be from Gas to Liquid (or reverse), or Liquid to Solid (or reverse).
Solid
General classes of colloids are: gas in liquid, gas in solid, liquid in gas, liquid in liquid, liquid in solid, solid in gas, solid in liquid, solid in solid.
solid
evaporation solid to liquid - melting liquid to gas - evaporation gas to liquid - condensation liquid to solid - freezing solid to gas and gas to solid - sublimation
Is a pencil a solid liquid or gas
evaporation solid to liquid - melting liquid to gas - evaporation gas to liquid - condensation liquid to solid - freezing solid to gas and gas to solid - sublimation
These nine types of solution are solid to solid solid to liquid solid to gas liquid to solid liquid to liquid liquid to gas gas to solid gas to liquid gas to gas
gas
a feather is a solid
Solid --> Liquid = melting Other changes of state: Solid --> Gas = sublimation Gas --> Solid = deposition Liquid --> Solid = freezing/solidification Gas --> Liquid = condensation Liquid --> Gas = vaporization
* solid to liquid: melting* liquid to solid: freezing* liquid to gas: vaporization* gas to liquid: liquefaction* solid to gas: sublimation* gas to solid: deposition
Zinc is all, a solid, liquid, and a gas. when it is melted, it is a liquid, when the liquid is heated, it becomes a vapor, a gas, and when the liquid is froze is is a solid.