What do the following have in common: the air you breath, the water in the oceans, the fluid in your body, and the brass in a button? Although they may sound unrelated, all of these examples describe mixtures. Very few of the materials you encounter everyday are pure substances. Most are heterogenous mixtures or homogenous mixtures. A pile of pennies and nickels, for example, is a heterogenous, which is characterized by visibly different parts. Lemonade from a mix is homogenous mixture. A homogenous mixture does not have parts that can b ....