The Ocean-Carbon Connection, starting on page 17 of the link, is level two of five levels contained in the Understanding Ocean Acidification curriculum module developed for the NOAA Ocean Data Education (NODE) Project. In this lesson, students examine graphs and maps to identify changes in pH, sea surface temperatures (SST), and dissolved CO2 levels in the Caribbean. Students then correlate changes in pH and SST to changes in CO2 levels over time. The interactive data interface is easy to operate and instructions are included in the teacher’s guide. Also included in this lesson is a demonstration of the formation of carbonic acid which requires distilled water, bromophenol blue indicator (or other similar indicator), and either dry ice or a straw. If these supplies are unavailable, a video demonstration may be substituted. If teachers choose to print out the maps, printing in color is recommended.
The suggested time for this lesson is 40 minutes, but may take longer depending on the length of student discussions of the presented graphs and maps.