The WAR for Carbonate Ions in Ocean Acidification This short activity allows students to visualize the negative impacts on ocean organisms as the pH of the ocean drops (ocean acidification or OA).It focuses on the how the changes in ocean chemistry, as more CO2 dissolves in the water, affects life in the ocean. Student groups play four rounds of a modified card game War with the changes in the rules as the pH of the ocean drops. This activity will help uncover student misconceptions that in order for OA to hurt organisms, the pH must reach acidic levels. This lesson is part of a broader unit on pH which would be applicable to both chemistry courses and the biochemistry unit in biology as well as ecological impacts of a changing environment. Topics Biogeochemistry, Ocean Acidification AuthorsKatie Lodes Teacher ResourcesLesson Plan Student ResourcesStudent Worksheet Additional Resourceshttps://www.whoi.edu/oceanus/feature/small-drop-in-ph-means-big-change-in-acidity (nice article with concrete examples to relate pH changes).https://pmel.noaa.gov/co2/story/A+primer+on+pH (very rich source with lots of links)12 minute video https://www.youtube.com/watch?v=GL7qJYKzcsk Next Generation Science StandardsCrosscutting ConceptsCause and effectCore IdeasPS1.B: Chemical ReactionsESS3.C: Human Impacts on Earth SystemsPracticesAsking questions (for science) and defining problems (for engineering)Analyzing and interpreting data Ocean Literacy Fundamental Concepts3.F: The ocean has had, and will continue to have, a significant influence on climate change by absorbing, storing, and moving heat, carbon and water.