Lesson A-3. Air Is a Substance and the Concept of the Atmosphere
Branley, Franklyn M. Air is All Around You (Let’s-Read-and-Find-Out Science 1). HarperCollins, 2006.
Guillain, Charlotte. The Skies Above My Eyes. Words & Pictures, 2018.
Ladd, Irene. The Air We Breathe. National Aeronautics and Space Administration, Langley Research Center, 2009. https://www.nasa.gov/stem-ed-resources/the-air-we-breathe.html