Secondary-2 : Breathing Experiment (Biology)
Secondary-2 did a simple experiment about breathing. This was the introduction activity before they learned about the respiratory system. This experiment aims to prove that carbon dioxide is the exhaled gas from our bodies. They needed small cups, straws, and lime water as the materials. They had to blow the lime water until it became blurry. After having the experiment, they made an experiment report in a paper. They were happy and amazed during the activity. ***
