LIQUID/LIQUID MIXTURES:

Examples:

Alcoholic beverages: They are a mixture of ethanol (liquid) in water

(liquid).

Vinegar: As noted above, vinegar is a solution of acetic acid (a liquid

when pure) in water.

LIQUID/GAS MIXTURES:

Examples:

The water in the air: It has a mixture of water (liquid) in the air

(gas).

Fizzy drinks: They are a mixture of water (liquid) and carbon

dioxide (gas).

Foam: Any kind of foam is a mixture of gas (bubbles) in a liquid.

Some examples would be bubble bath (the gas is air, the liquid is

water; soap helps to stabilize the foam, making the bubbles last

longer before "popping").

SOLID/SOLID MIXTURES:

Examples:

Concrete is a similar solid/solid mixture (of cement and gravel),

though in this case the cement is initially a liquid/solid mixture and

becomes a solid through a chemical reaction (hence concrete is

more complicated to explain).

Metal alloys. Probably the most important examples of solid/solid

solutions are metal alloys. The best-known is certainly steel, which

is an alloy of iron and carbon, often with additional metal elements

added in to provide special properties (like chromium and nickel, to

make stainless steel).