1. Compounds, Mixtures and Solutions Compounds A pure substance composed of two or more elements that are chemically combines Involves a chemical change Each compound has its own physical and chemical properties Compounds are new pure substances different from the elements that make it up

2. Mixtures A combination of two or more substances that are not chemically combined No reaction or change takes place – Example is a pizza. Cheese and tomato sauce do not react when put together Each substance in a mixture keeps its identity Mixtures involve physical changes only

3. Solutions A mixture that appears to be a single substance Composed of particles of two or more substances that are distributed evenly among each other Solute is the substance that is dissolved Solvent is the substance in which the solute is dissolved