1. Variable Composition: Mixtures can have varying proportions of their components. For example, you can make a weak or strong salt solution by adding different amounts of salt to water.

2. Retention of Individual Properties: The substances in a mixture retain their original chemical properties. For example, in a mixture of sand and iron filings, the sand remains sand and the iron filings remain iron filings.

3. Easily Separated: Components of a mixture can typically be separated by physical means, such as filtration, evaporation, or magnetic separation. For example, you can separate sand and iron filings using a magnet to attract the iron.