Water I think.
A person is gas,liquid and solid.
A gas is something that is not be liquid or solid
A volcano is made of solid rock.
gas liquid
It is a solid because leafs aren't made of water or gas.
Matter.
A gas is something that is not a solid or a liquid like water.
Carbon is a solid most of the time, but can be made into a liquid, gas, or plasma.
Solid
Liquid
A solution can be made with a solid, liquid, and gas because the solute from the solid and gas can dissolve in the liquid solvent to form a homogeneous mixture. The individual particles of the solid and gas mix with the liquid molecules, allowing for the creation of a solution.
It is mostly gas, but it has a solid core.