Introduction
Teacher Input 5
- Ask learners: When does photosynthesis take place? Is it during the day or night?
Answer: Day.
- Ask learners why they think photosynthesis cannot occur at night.
Answer: Plants need sun energy for photosynthesis to take place.
- Remind learners that we all need oxygen to survive: We breathe in the oxygen and we breathe out carbon dioxide.
- Tell learners that:
- Plants play a very special role in our lives because during photosynthesis the plant uses carbon dioxide from the air and gives off oxygen into the air.
- Humans, as well as all animals, need oxygen from the air to live.
- Animals, including people, breathe in oxygen and breathe out carbon dioxide.
- This carbon dioxide is then used by plants for photosynthesis.
- Present an overview of the relationship between plants and air by using PRESENTATION 2: PLANTS AND AIR.
- Show VIDEO CLIP 2: Carbon dioxide cycle or Circle of Life (3:18 min.).
Teacher Input 6
Revision Activity 1
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