This lesson introduces students to the carbon-oxygen cycle, global warming, ocean acidification, and climate change. Students are reminded that photosynthesis and cellular respiration are opposite reactions, and fill out a simple graphic showing the carbon-oxygen cycle. Students are then shown that human activities, particularly the burning of fossil fuels, has disrupted this cycle. Students are shown graphical evidence that carbon dioxide is increasing in the atmosphere, and then the lesson discusses the following consequences of that increased carbon dioxide:
1. Increased global temperature, leading to more unpredictable weather and sea level rise, and
2. Ocean acidification, leading to decreased oceanic absorption of atmospheric CO2 and to physiological and behavioral changes in ocean animals. (Specifically, the inability of molluscs to make shells, and the fact that fish in acidic waters don’t actively avoid their predators.)
Finally, students measure and record the temperature inside and outside of a mason jar terrarium, and explain the difference. If you choose not to make and use mason jar terrariums, your students can still answer the questions using the picture and common sense.
Zip file contains: 1.Powerpoint 2.PDF, to guarantee formatting and for easy printing, 3.Word document, to make it easier to edit.
Document is 100% my original material, except for images that are readily available on google image search.