The mantle is the layer of the Earth that makes up most of Earth's mass. The mantle is a thick layer of hot rock that surrounds the hot, liquid, outer core. The mantle is below the crust and above the outer core.
Answer & Explanation:
The function of the sodium bicarbonate in this experiment, was providing carbon dioxide for photosynthesis to occur. ... For photosynthesis to happen for a light independent reaction, carbon dioxide needs to enter the plant.