Photosynthesis: Raw Materials and Process Explanation

1. 5 points for first to tell me. What is todays topic?

2. Photosynthesis Starter: What would happen if plants started eating people? How could we stop them? What are the raw materials for photosynthesis and where are they from?

3. Success criteria • Success Criteria • I can list the requirements and products for photosynthesis. • I can explain where reactants are from and how the products are used. What are the raw materials for photosynthesis and where are they from?

4. Think, pair, share • If all it takes is being green to make plants photosynthesise WHY isn’t the desert full of cacti? What are the raw materials for photosynthesis and where are they from?

5. NEWS FLASH What are the raw materials for photosynthesis and where are they from?

6. Humans have developed the ability to photosynthesise! 10 points for diagram and full labels. 5 for a good start -5 for no work. • In groups, draw a human that can photosynthesise. Include the following: 1) What will humans need to get and where from? 2) What will humans NOT need any more? 3) How will human behaviour change? 4) What impact will this have on the world? What are the raw materials for photosynthesis and where are they from?

7. Task: Watch Tim and Moby “photosynthesis” • Be prepared to answer some questions What are the raw materials for photosynthesis and where are they from?

8. “man eating“ plants

9. True or False? True False What are the raw materials for photosynthesis and where are they from?

10. Plants BREATHE out oxygen True False What are the raw materials for photosynthesis and where are they from?

11. Plants only USE CO2 True False What are the raw materials for photosynthesis and where are they from?

12. Photosynthesis does not work in the dark True False

13. CHLOROPHYLL • in the leaves Pink boxes show raw materials needed. Blue show what is produced. Fill in the boxes, Use this info to make a word equation for photosynthesis. What are the raw materials for photosynthesis and where are they from?

14. The equation for PHS Light energy chlorophyll In words Carbon Dioxide + water  Glucose + Oxygen What are the raw materials for photosynthesis and where are they from?

15. Complete the past paper summary question • http://www.bbc.co.uk/programmes/p00lxtl2

16. Check point • What are the two chemical reactants in PHS 1) Oxygen and water 2) Light and water 2) Carbon dioxide and water

17. MINI WHITE BOARDS • Where do the products get used? • Where do the reactants come from? • Pupils write on mini white boards where they think the chemicals come / go from.

18. I can list the requirements and products for photosynthesis. I can explain where reactants are from and how the products are used. Task – CHALLENGE C Grade Complete the past paper questions and write a mark scheme for question 2. IRON MAN B Grade Use the past paper question to help you design an experiment to find out how light level affects the rate of photosynthesis. Can do D/C Grade Complete the past paper questions

19. Bingo • Leaf • Photosynthesis • Glucose • Oxygen • Water • Carbon dioxide • sunlight • Minerals • Roots • Pores • Chlorophyll • Chloroplasts • Energy • Carbohydrate

20. Plenary • Round the room game. • http://www.bbc.co.uk/programmes/p00fgpfl/clips What are the raw materials for photosynthesis and where are they from?

21. Inside a plant Starter: Look at the following diagram, copy it and answer the question.. Which way will the particles move ? How do plants get the materials they need for photosynthesis. molecule

22. What does todays Lesson Look like? To do list Success criteria Explained that molecules will move from high to low concentration. Starter: Complete the starter on movement of molecules . Main: Discussed the structure of a leaf. Explain the shape of the leaf including the air gaps, stomata and long palisade cells.. Investigate stomata Observe and draw stomata. Explain that their role is gas exchange. Checkpoint – best definition of stomata. Look in more detail at structure of leaf. Had class discussion on structure of leaf OR completed labelling task. Used knowledge and text books to draw a fully annotated plant. Plenary: Draw a diagram of a plant fully annotating it using the key words,

23. The structure of a leaf • This is a cross section through a leaf. • Can you decide which is the top of the leaf and which is the bottom?

24. Getting Gases In – lets investigate Aim: to observe and draw stomata. Method: 1) Paint the underside of a leaf with clear nail varnish. 2) Leave to dry 3) Peel off nail varnish 4) Observe under microscope and draw.

25. Check Point – what is the job of the stomata? 1 2 3 4 To let oxygen out To allow gas exchange to occur. To allow a plant to breathe. For a plant to get water.

26. Inside a leaf

27. OR: Match the label to the correct function. • Top • Bottom 5 4 6 2 3

28. The stomata are holes that exchange CO2 and O2 Guard cells open and close the stomata Lots of chloroplasts for photosynthesis Cuticle – a waxy, waterproof, protective layer that prevents water loss. Spongy mesophyll – large air gaps let gases diffuse through the leaf

29. Task • Draw a diagram of a plant with roots, stem, leaves, etc • Use your knowledge to label and annotate the diagram. • Key wordsStem leaf root root hair cell sun light energy photosynthesis respiration water Carbon dioxide oxygen phloem vessels glucose

30. Its not just plants that photosynthesise! Plankton also photosynthesise, it helps oxygen gets into water http://www.youtube.com/watch?v=ZdVHZwI8pcA