The 7th grade has been learning about the products and reactants of both photosynthesis and cellular respiration. To get a visual, we used an indicator liquid that changes color in the presence of carbon dioxide. Normally blue in color, it turns yellow when carbon dioxide is present. Our student volunteers blew through a straw into beakers of this solution, turning it yellow and proving the presence of carbon dioxide in our exhalations (a waste product of cellular respiration). We then placed aquatic plants in both containers. One was placed in the windowsill and the other was placed in a dark cabinet for 24 hours.
Can you tell which beaker's plant was taking carbon dioxide out of the water for photosynthesis?
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