Classifying Matter Learning Goal: to be able to describe the differences between pure substances and mixtures

Matter: anything that has mass and takes up space Everything except energy

Pure Substance- has a fixed, uniform composition and the properties do not vary Cannot be separated into other matter by separation processes (will talk later) Has uniform properties such as density, melting point, boiling point.

A. Element Fixed composition, smallest part IS an atom. i. An element cannot be broken down into a simpler substance. ii. Identify the elements below.

b. Compounds – two or more different elements in fixed proportion i. The properties of a compound differ from the properties from which it was made. ii. Compounds can be broken down into simpler substances. Identify the compounds below.

2. Mixture- combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.

a. Homogeneous Mixture Homogeneous comes from the Greek words homo and genus, meaning “same” and “kind.” i. substances are evenly distributed. Identify the homogeneous mixtures below.

b. Heterogeneous Mixture Heterogeneous comes from the Greek words hetero and genus, meaning “different” and “kind.” Identify the heterogeneous mixtures below.