Heating Baking Soda
-Baking soda: sodium bicarbonate.
-Releases gas when heated.
-Baking soda had changed, no longer baking soda.
-Control group: unheated baking soda and tea.
-Experimental group: heated baking soda and tea.
-Control factors: same amount of tea, same amount of baking soda, same size test tube, same amount of stirring time, same type of tea.