Lesson Three

Direct Instruction (15 minutes):

1. Define photosynthesis: The process by which green plants use sunlight to make their own food from carbon dioxide and water.
2. Present the chemical equation: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2.
3. Break down the components:
   • Carbon dioxide (CO2) from the air
   • Water (H2O) from the soil
   • Sunlight as the energy source
   • Chlorophyll in chloroplasts captures light

Guided Practice (15 minutes):

1. Use a diagram to label the parts involved in photosynthesis.
2. Students work in pairs to match terms (e.g., chloroplast, glucose) with their definitions.
3. Pass around leaf samples and identify chlorophyll.