Condensation and then freezing.
Solids don't change their size or shape.
Gases change their volume according to the container that they are in. Liquids change shape but not volume, and solids change neither shape nor volume.
Flow. Gases and liquids can both modify their shapes.
They are lighter in density as compared to solids. Gas are compressible, whereas not all solids. Gases exhibit better flow characteristics than solids. Gases readily react with other substances. All solids are seen by the naked eye whereas some gases are not.
Gases
When cooled gases change to liquids (usually) and then solids Solids don't change to gases upon cooling
Solids don't change their size or shape.
Liquids yes, gasses yes, solids no
Solids don't change their size or shape.
Because there is a freezing point, a boiling point so Solids can change into liquids and liquids can change into gases and all over again!!!!!!!!!!!!!!
Gases change their volume according to the container that they are in. Liquids change shape but not volume, and solids change neither shape nor volume.
shape and volume
Unlike solids and liquids, a gas will expand to fill the space available to it.
solids cannot be poured , they cannot also change shape unless you bend it , break a bit of it or melt it. liquids can be poured. gases can not be condensed down
some solids,liquids and gases are dangers some are not dangers
Solids have a definite volume and gases have a variable volume
i would say solids but it depends on how good youare with solids or gases. hope this helps :)