Photosynthesis is the process by which plants, algae, and some bacteria use sunlight, water and carbon dioxide to produce oxygen and energy in the form of glucose. Chlorophyll, a green pigment found in leaves, stems and chloroplasts, is essential in photosynthesis as it absorbs energy from sunlight. The overall reaction is: 6CO2 + 6H2O + Light energy → C6H12O6 + 6O2. Photosynthesis occurs in two stages: the light-dependent reactions and the light-independent reactions.

1. Cool question
What is
photosynthesis?

2. How does it work?
• Groups of 4 people
• Each one in the group has a number from 1 to 4
• Teacher asks one question
• 1. Think on your own and write the answer
• 2. Go to your groups, share your answers, you can change your
answer.
• 3. Teachers say a number from 1 to 4. The students with that
number say their group answer.

3. Rules
• I respect others’ answers even if they are wrong.
• I wait patiently for my turn, (instead of raising
my hand and making sounds)
• I take my time to think
• I can ask for help
• Everyone can think and answer every question

4. Answering process
• Listen to the question.
• Understand what is being asked for.
• Answer to self.
• Answer out loud.
• Rethink and revise your answer.