Carbon Dioxide - Sources and Sinks

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Where does all of the carbon dioxide come from that is supposedly leading to climate change? Earth science pupils test animal, plant, and fossil fuels as sources in this investigation. Using an indicator, BTB, they are able to detect the presence of carbon dioxide in their own breath, from an Elodea plant, and in car exhaust. Learners must be experienced in the lab in order to complete this worthwhile lesson. It would be a great addition when studying climate change or the carbon cycle.

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Concepts

carbon dioxide, indicators, sinking and floating