An activity that introduces the concept of chaos to students is presented. Smoke rising from burning incense is used to represent changes in atmospheric flow. The lab, involving fluid dynamics, avoids mathematical models to highlight deterministic chaos within nature itself. Reproducible pages are provided. (KR)

The relationship between specific gravity, salinity, and density in brine solutions is investigated. Students construct hydrometers to reinforce concepts learned in oceanography. Background information, salt requirements for the unknowns, directions, and reproducible worksheets are included. (KR)