Answer:

1. All substances can be characterized by their unique sets of physical and chemical properties. Properties that can be determined without changing the composition of a substance are referred to as physical properties. Characteristics such as melting point, boiling point, density, solubility, color, odor, etc.

2. Each individual component of a mixture retains its original physical and chemical properties. Also, it is generally easy to separate the individual components of a mixture. Finally, the proportion of the components throughout the mixture varies.

3. Mixtures and pure substances are alike because mixtures are made up of two or more pure substances. This means that where pure substances have a single set of properties, mixtures may have two or more sets of the same properties, based on the pure substances that make up the mixture.