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In this experiment, learners will investigate the release of carbon-containing gas from living and nonliving sources. Learners scratch the surface of a limestone rock and observe what happens when they place a few drops of vinegar on the scratched area. Next, learners observe what happens when they release carbon dioxide from a balloon into a beaker with Bromothymol Blue. Learners are encouraged to consider how the results of this experiment would change if they added an aquatic plant to the beaker and also design a method for demonstrating how plants give off carbon dioxide.
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