Introuduce your scientists to the differences in air at varying altitudes with a colorful explanatory graph. After some discussion, they view unbelievable footage of mountain-climbing Leo Houlding and a narrative about how he might do climbing Mount Everest. Unfortunately, links to the articles to read in the closing activity are no longer working. If you set up a free National Geographic membership, you can find the articles through their website. This would be a fascinating enrichment to your atmosphere unit.