This document provides notes on chemical and physical changes for students. It defines key terms like chemical change, physical change, chemical formula, and chemical equation. It explains that a chemical change results in a new substance, while a physical change only alters the substance's size, shape, or phase. It also notes that for a chemical change there must be evidence like a color change, gas formation, temperature change, or precipitate formation. The goal is for students to understand the differences between chemical and physical changes and be able to investigate examples of each.