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Title: Off Base
Grade Level: High school
Source: NOAA


This activity explores the phenomenon of ocean acidification, why it is happening, and what factors into the rate of decrease in oceanic pH. Students will do background research on the subject, and conduct hands-on measurements of changes in pH caused by acetic acid and sodium hydroxide in simulated sea water. The context of this lesson is coral and its health relative to oceanic acidity, but the overall lesson can be applied to New England species that use calcium carbonate, as well as the overall impact of more acidic surroundings on aquatic organisms.

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MA: Biology: The Chemistry of Life, Ecology; Chemistry: Properties of Matter, Solutions, Rates of Reaction, and Equilibrium, Acids and Bases.


NH: SPS:Making Observations and Asking Questions, Conducting Scientific Investigations, Evaluating Scientific Explanations, Representing and Understanding the Results of Investigations, Nature of Science, Patterns of Change, Common Environmental Issues, Natural Resources Management and Conservation, Information and Media Literacy, Critical Thinking and Systems Thinking; ESS1: Local and Global Environmental Issues; LS: Environment, Change. PS: Conservation.

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