This brief presentation covers "air," the composition of Earth's atmosphere, and a concise explanation of each major layers. The five layers covered are include the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. I have also included directions for a fun space travel poster activity I used in class to solidify the ideas. The students had a lot of fun doing it! This presentation is a great introduction of wrap up for several different classes. I used it in physical science and