Introduce matter to your early elementary students by exploring solids, liquids and gases. Start the unit with a powerpoint presentation that includes an interactive game. Your students will be busy with a phases of matter science center game. They will create an interactive mini book that includes the states, atoms, and physical properties. Posters that define Atoms, Solids, Liquids, Gases, Matter, and Matter on Earth. The posters are available in color and black and white. You will also get 4