Bill Nye explains why it gets colder as one travels up through the atmosphere. He uses miniature replicas of a city and a mountain to support his explanation. Bill also briefly touches upon the lapse rate.
Bill Nye showcases the different types of soil in his lab. He explains and illustrates the soil profile (what soil would look like if you can dig into it and view it from the side) of each type. He also explains how soil and dust are created: from rocks and living creatures.