The document is a science teacher's review questions on distinguishing substances from mixtures based on their properties. It contains 10 multiple choice questions asking students to identify the classes of matter, whether examples given are substances or mixtures, and the appropriate techniques for separating components of mixtures. It also includes a poem contrasting the properties of substances and mixtures, as well as images illustrating various separation techniques like sieving, evaporation, decantation, filtration and magnetism. The review aims to help students understand the differences between pure substances and mixtures through examination of their composition, appearance, separating techniques, and boiling/melting behaviors.