(a) Solid state: Ice, glass, rock, most metals, table sugar, frozen CO2 (dry ice), wood, butter etc.
(b) Liquid state: Water, alcohol, milk, mercury, vegetable oil, ethanol, bromine, blood, honey, coffee etc.
(c) Gaseous state: Air, helium, nitrogen, water vapour, propane, natural gas, ozone, hydrogen sulphide etc.