Our Grade 7 students explored an interesting aspect of human respiration through a simple lime water experiment.

The students gently blew exhaled air into lime water using a straw and observed that the lime water turned milky. This change provided clear evidence that carbon dioxide is present in the air we breathe out.

Through this hands-on activity, students connected classroom learning with a real-life observation and gained a better understanding of respiration and the release of carbon dioxide.

Learning by doing makes science come alive!

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