Fun online lab to teach your students on factors that affect pressure (in a closed system). Your students will use the following site: https://phet.colorado.edu/sims/html/states-of-matter-basics/latest/states-of-matter-basics_en.html
Students will learn about how adding and remove heat affects pressure, also how increases and decreases volume affects it, and lastly, adding molecules.
Just print worksheet and go. Includes follow-up/analysis questions.