This document provides an overview of 6th grade science concepts about matter and energy. It defines matter as anything that has mass and takes up space, and describes the three states of matter - solid, liquid, and gas. It explains that matter is made up of pure substances or mixtures. Mixtures can be separated using various methods like filtration, evaporation, distillation, or decantation. Changes in states of matter, like melting, boiling, condensation and solidification, occur when matter is heated or cooled. It also introduces different types of energy like mechanical, chemical, electrical, light, nuclear, and thermal energy. Energy can be either potential or kinetic.