Photosynthesis Learning Objectives To know what happens during photosynthesis To devise experiments for photosynthesis To identify the limiting factors for photosynthesis

Success Criteria All can describe photosynthesis and use the word equation Most can devise an experiment to show the need for a raw material Some are able to use the symbol equation and explain what is happening

Using plants

Photosynthesis: word equation activity

What is the symbol equation for photosynthesis? The reaction of photosynthesis can be represented by the following equation: CO 2 H2OH2O C 6 H 12 O 2 O2O2 ++ Is this a balanced symbol equation? How would you balance the equation? 66 6 light energy chlorophyll carbon dioxide +  wateroxygen + glucose light energy chlorophyll  What is the symbol equation for this reaction?

Word equation to symbol equation

Photosynthesis equation quiz

Learning Objectives 1 To be able to interpret primary data 2 To be able to explain how carbon dioxide, light and temperature may limit the rate of photosynthesis 3 To be able to interpret graphs showing the effect of changing a limiting factor.

Success Criteria All can interpret the data and draw conclusions based on their understanding of photosynthesis Most can explain how carbon dioxide, light and temperature may limit the rate of photosynthesis Some can interpret graphs showing the effect of a limiting factor, using their knowledge and understanding of photosynthesis

Like many reactions, photosynthesis requires enzymes. Photosynthesis is a chemical reaction and so has a rate. What is the rate of photosynthesis? light How do these factors affect the rate of photosynthesis? carbon dioxide temperature I

What is the ideal combination of factors for the maximum rate of photosynthesis? What is a limiting factor? enough light How does restricting one of these facts affect the rate? If one of the factors is restricted, the rate of photosynthesis will be below the maximum possible rate. The restricted factor controls how quickly photosynthesis occurs and so limits the rate. It is called the limiting factor. enough carbon dioxide ideal temperature (not too hot or cold).

Investigating photosynthesis – results

Light intensity and photosynthesis

Carbon dioxide and photosynthesis

Temperature and photosynthesis

How is glucose used?

Multiple-choice quiz