There is an explanation of the reactant and products of photosynthesis. The mention of light and chlorophyll as necessary components is also made. The differences between photosynthesis and respiration in terms of energy use are discussed.

First broadcast:
21 November 2008

The clip can be used following study of respiration in animals and after an introduction to the basics of photosynthesis. The class could talk over the two equations and how they relate to each other. It would be worthwhile to explain why both photosynthesis and respiration take place in plants and the balance between these.