Learning objective =  Students will understand Earth's atmosphere (increasing altitude, less air pressure)

Resource 1 = https://www.khanacademy.org/science/grade-9-physics-snc-aligned/x9650cb4941ab1ab5:mechanical-properties-of-matter/x9650cb4941ab1ab5:atmospheric-pressure/e/air-pressure?authuser=0 

Resource 2 = https://studyjams.scholastic.com/jams/science/weather-and-climate/earths-atmosphere.htm