I made this lesson for my middle ability year 10 GCSE science class. They have studied photosynthesis before in year 9 so this is a recap of the main themes. The lesson comprises of a PowerPoint presentation (with explanatory notes) and a worksheet.
This lesson introduces a practical element - testing leaves for starch and is designed to cover the following learning objectives:
Write the word and symbol equation for photosynthesis.
Explain why photosynthesis is important for the survival of other organisms.
Investigate the need for light, carbon dioxide and chlorophyll to make glucose.
Explain why plants should be de-starched before photosynthesis experiments and describe how this is done.
Describe experiments to show that plants produce oxygen in the light.
Test to see if a leaf contains starch.
Explain why the leaves are tested for starch and not for sugar.
Describe the test for oxygen.
Interpret results and relate to photosynthesis equation.
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