In this experiment, I filled up a trash bag with hot air and sealed it shut to create something similar to a hot air balloon. In Dr. Kurt's class, we learned about geodesic spheres which are spheres made up of many small triangle connected in a certain pattern. There are three gas laws. Boyles' Law states that the volume of gas increases as pressure decreases. Charles' law says that the volume of gas increases as the temperature increases. Lastly, Avogadro's law says that the volume of gas increases as the temperature decreases.