Photosynthesis english version ( science form 2)

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Photosynthesis english version ( science form 2)

  1. 1. PEMBANGUNAN BAHAN MEDIAINTERAKTIF INSTRUKSIONAL DANTEKNOLOGI DALAM PTV (MBE13803)Nama : SITI HAWA BINTI MD. JAMILNo. K/P : 780627-01-5186No. Matrik : HB100181
  2. 2. Topic 2 Interdependence among living Organisms and the Environment 4.4 PhotosynthesisScience Form 2
  3. 3. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Plants cell Basic structure of plants cell Leaf cross section Leaf Mesophyll cell Nucleus Cell wall Cell membrane Mesophyll Chloroplast Contain chlorophyll to absorb light energy for photosynthesis.Science Form 2
  4. 4. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Photosynthesis A process where green plants make food from water and carbon dioxide (CO2) with the presence of sunlight and chlorophyll. + +Science Form 2
  5. 5. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Photosynthesis Hair roots absorb underground water and dissolved minerals Water reaches the leafScience Form 2
  6. 6. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Photosynthesis  Carbon dioxide molecules enter the leave through stomata.  Stomata are pores in the surface of the leaf.Science Form 2
  7. 7. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Photosynthesis Chlorophyll is green pigment to absorb light energy to make glucose during photosynthesis. Mesophyll cell Nucleus Cell wall Cell membrane Chloroplast Light energy transparent • Green pigment called outer chlorophyll membrane •Absorb light energy to make glucose (photosynthesis)Science Form 2
  8. 8. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Photosynthesis The oxygen molecules produced during photosynthesis is released into the air through stomata. Human, animals and plants use the oxygen from the air for respiration.Science Form 2
  9. 9. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Photosynthesis  The glucose produced during photosynthesis is then converted to starch and stored in leaves, fruits, tubers, stem and roots. Fruit Stem Leaf Tuber RootScience Form 2
  10. 10. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Photosynthesis  Requirements of photosynthesis are light, chlorophyll, carbon dioxide and water sunlight Water + Carbon dioxide Glucose + Oxygen chlorophyll Carbon dioxide Glucose Water OxygenScience Form 2
  11. 11. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Aim : To test for the presence of starch in green leafScience Form 2
  12. 12. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Apparatus : Bunsen burner, wire gauze, tripod stand, beaker, boiling tube, Petri dish, boiling tube rack, forceps, glass rod, dropper, and white tile. Wire gauze Tripod stand Bunsen BurnerScience Form 2
  13. 13. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Apparatus : Bunsen burner, wire gauze, tripod stand, beaker, boiling tube, Petri dish, boiling tube rack, forceps, glass rod, dropper, and white tile. Petri dish Beaker Boiling tubeScience Form 2
  14. 14. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Apparatus : Bunsen burner, wire gauze, tripod stand, beaker, boiling tube, Petri dish, boiling tube rack, forceps, glass rod, dropper, and white tile. Glass rod Boiling tube rack Forceps Dropper White tileScience Form 2
  15. 15. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Materials : Green leaf, alcohol, water and iodine solution Green leaf Alcohol Iodine solution 200ml waterScience Form 2
  16. 16. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Procedure : 1. Immerse a leaf in boiling water for 2 to 3 minutes to soften and break the cell walls. Boiling water Green leaf Beaker Wire gauze Tripod stand Bunsen burnerScience Form 2
  17. 17. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Procedure : 2. Transfer the boiled leaf into a boiling tube containing alcohol. Place the tube in a water bath for a few minutes to decolourise the leaf. Boiling tube ! Alcohol is highly Leaf has flammable. decolourized Never heat the tube of Water bath alcohol directly with Alcohol the Bunsen flame. Turn off the Bunsen flame before putting the boiling tube into the water bath.Science Form 2
  18. 18. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Procedure 2 : Explaination Iodine solution turns starch into dark blue. This changes cannot be observed clearly with the presence of chlorophyll which is dark green pigment. Once the cell wall was broken down, the chlorophylls can move out of the cells and dissolve in alcohol. The leaf becomes yellowish and the alcohol becomes green. The colour changes after iodine test can be observed clearlyScience Form 2
  19. 19. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Procedure : 3. Remove the leaf and put it back into hot water for a few seconds to soften the leaf. Decolourized leaf Hot waterScience Form 2
  20. 20. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Procedure : 4. Spread the leaf on a white tile. Add a few drops of iodine solution to test for the presence of starch. Dropper Decolourized leaf Iodine solution White tileScience Form 2
  21. 21. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Activity Observation : 1. Observe the colour changes after iodine test. 2. Discuss your observation and inference with your friends. 3. Record your observation and inference in your Science Journal.Science Form 2
  22. 22. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Aim : To investigate the presence of carbon dioxide is required for photosynthesis.  Problem : Do plants need carbon dioxide for photosynthesis? Hypothesis : Plants need carbon dioxide for photosynthesis.  Manipulated variable : Presence of carbon dioxide  Responding variable : Presence of starch  Fixed variables : Presence of light, chlorophyll and waterScience Form 2
  23. 23. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Apparatus : Bunsen burner, wire gauze, tripod stand, beaker, boiling tube, Petri dish, spatula, boiling tube rack, forceps, glass rod, dropper, and white tile. Wire gauze Tripod stand Bunsen BurnerScience Form 2
  24. 24. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Apparatus : Bunsen burner, wire gauze, tripod stand, beaker, boiling tube, Petri dish, spatula, boiling tube rack, forceps, glass rod, dropper, and white tile. Petri dish Beaker Boiling tube SpatulaScience Form 2
  25. 25. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Apparatus : Bunsen burner, wire gauze, tripod stand, beaker, boiling tube, Petri dish, spatula, boiling tube rack, forceps, glass rod, dropper, and white tile. Glass rod Boiling tube rack Forceps Dropper White tileScience Form 2
  26. 26. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Materials : Potted green plant, Plastics, thread, potassium hydroxide, alcohol, water and iodine solution Plastic Potassium hydroxide Potted green plant ThreadScience Form 2
  27. 27. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Materials : Potted green plant, Plastics, thread, potassium hydroxide, alcohol, water and iodine solution Alcohol Iodine solution 200ml waterScience Form 2
  28. 28. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Procedure: 1. Keep a potted plant in the dark for two days to make sure all the starch are used up (destarch). Potted green plantScience Form 2
  29. 29. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Procedure: 2. Set up the apparatus as shown below expose the potted plant to sunlight for about two hours. ! Potassium hydroxide pellets is corrosive. Handle only with spatula / forceps Leaf A Leaf B Potassium hydroxideScience Form 2
  30. 30. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Procedure : 3. After 2 hours, pluck Leaf A and B. Immerse Leaf A and B in boiling water for 2 to 3 minutes to soften and break the cell walls. Boiling water Green leaf Beaker Wire gauze Tripod stand Bunsen burnerScience Form 2
  31. 31. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Procedure : 4. Transfer the boiled Leaf A and B into a boiling tube containing alcohol. Place the tube in a water bath for a few minutes to decolourise the leaf. Boiling tube ! Alcohol is highly Leaf has flammable. decolourized Never heat the tube of Water bath alcohol directly with Alcohol the Bunsen flame. Turn off the Bunsen flame before putting the boiling tube into the water bath.Science Form 2
  32. 32. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Procedure : 5. Remove the Leaf A and B and put it back into hot water for a few seconds to soften the leaf. Decolourized leaf Hot waterScience Form 2
  33. 33. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Procedure : 6 . Spread Leaf A and B on different white tile. Add a few drops of iodine solution to test for the presence of starch. Leaf A Leaf BScience Form 2
  34. 34. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Observation : Discuss your observation and inference with your friends. Record your observation in a table. Leaf Change in colour Inference A BScience Form 2
  35. 35. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Discussion : 1. Why is it important to keep the potted plant in the dark for two days? 2. Why do we place potassium hydroxide pellets in plastic A? 3. Which leaf will turn blue-black when tested with iodine solution?Science Form 2
  36. 36. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 1 Conclusion : 1. State your conclusion. 2. Is your hypothesis accepted? 3. Write your report.Science Form 2
  37. 37. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Aim : To investigate sunlight is required for photosynthesis.  Problem : Do plants need sunlight to make starch? Hypothesis : Plants need sunlight for photosynthesis.  Manipulated variable : Presence of sunlight  Responding variable : Presence of starch To be completed by the student  Fixed variables : Presence of carbon dioxide, chlorophyll and waterScience Form 2
  38. 38. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Apparatus : Beaker, Bunsen burner, tripod stand, wire gauze, boiling tube, dropper, white tile, scissors and forceps Wire gauze Tripod stand Bunsen BurnerScience Form 2
  39. 39. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Apparatus : Beaker, Bunsen burner, tripod stand, wire gauze, boiling tube, dropper, white tile, scissors and forceps Petri dish Beaker Boiling tube ScissorsScience Form 2
  40. 40. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Apparatus : Beaker, Bunsen burner, tripod stand, wire gauze, boiling tube, dropper, white tile, scissors and forceps Glass rod Boiling tube rack Forceps Dropper White tileScience Form 2
  41. 41. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Materials : Potted green plant, iodine solution, alcohol, black paper, paper clips and water. Black paper Potted green plant Paper clipsScience Form 2
  42. 42. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Materials : Potted green plant, black paper, paper clips, iodine solution, alcohol, and water Alcohol Iodine solution 200ml waterScience Form 2
  43. 43. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Procedure: 1. Keep a potted plant in the dark for two days to make sure all the starch are used up (destarch). Potted green plantScience Form 2
  44. 44. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Procedure: 2. Set up the apparatus as shown below and expose the potted plant to sunlight for about two hours. Leaf A Black paper Paper clip Potted green plantScience Form 2
  45. 45. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Procedure : 3. Immerse Leaf A in boiling water for 2 to 3 minutes to soften and break the cell walls. Boiling water Green leaf Beaker Wire gauze Tripod stand Bunsen burnerScience Form 2
  46. 46. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Procedure : 4. Transfer the Leaf A into a boiling tube containing alcohol. Place the tube in a water bath for a few minutes to decolourise the leaf. Boiling tube ! Alcohol is highly Leaf has flammable. decolourized Never heat the tube of Water bath alcohol directly with Alcohol the Bunsen flame. Turn off the Bunsen flame before putting the boiling tube into the water bath.Science Form 2
  47. 47. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Procedure : 5. Remove Leaf A into hot water for a few seconds to soften the leaf. Decolourized leaf Hot waterScience Form 2
  48. 48. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Procedure: 6. Spread Leaf A on a white tile. Add a few drops of iodine solution to test for the presence of starch.Science Form 2
  49. 49. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Observation : Discuss your observation and inference with your friends. Record your observation in a table and draw Leaf A ( indicating blue- black portion ). Leaf A Change in colour Inference Portion covered with black paper Portion expose to sunlightScience Form 2
  50. 50. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Discussion : 1. Why do we wrap a portion of leaf with black paper? 2. Which part of leaf A shows a blue-black colouration when tested with iodine solution?Science Form 2
  51. 51. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 2 Conclusion : 1. State your conclusion. 2. Is your hypothesis accepted? 3. Write your report.Science Form 2
  52. 52. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Aim : To investigate chlorophyll is required for photosynthesis.  Problem : Do plants need chlorophyll tothe student To be completed by make starch? Hypothesis : Plants need chlorophyll for photosynthesis. To be completed by the student  Manipulated variable : Presence of chlorophyll  Responding variable : Presence of starch To be completed by the student  Fixed variables : Presence of light, carbon dioxide and waterScience Form 2
  53. 53. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Apparatus : Beaker, Bunsen burner, tripod stand, wire gauze, test tube, dropper, white tile and forceps Wire gauze Tripod stand Bunsen BurnerScience Form 2
  54. 54. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Apparatus : Beaker, Bunsen burner, tripod stand, wire gauze, test tube, dropper, white tile and forceps Petri dish Beaker Boiling tubeScience Form 2
  55. 55. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Apparatus : Beaker, Bunsen burner, tripod stand, wire gauze, test tube, dropper, white tile and forceps Glass rod Boiling tube rack Forceps Dropper White tileScience Form 2
  56. 56. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Materials : Potted green plant with variegated leaves, iodine solution, alcohol and water. Alcohol Iodine solution 200ml water Potted green plant with variegated leavesScience Form 2
  57. 57. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Procedure: 1. Expose the potted plant with variegated leaves to sunlight for about two hours.Science Form 2
  58. 58. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Procedure: 2. Pluck one leaf and trace its outline in your science journal. Indicate where the green and non-green area are.Science Form 2
  59. 59. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Procedure : 3. Immerse a variegated leaf in boiling water for 2 to 3 minutes to soften and break the cell walls. Boiling water Variegated leaf Beaker Wire gauze Tripod stand Bunsen burnerScience Form 2
  60. 60. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Procedure : 4. Transfer the boiled variegated leaf into a boiling tube containing alcohol. Place the tube in a water bath for a few minutes to decolourise the leaf. Boiling tube ! Alcohol is highly Leaf has flammable. decolourized Never heat the tube of Water bath alcohol directly with Alcohol the Bunsen flame. Turn off the Bunsen flame before putting the boiling tube into the water bath.Science Form 2
  61. 61. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Procedure : 5. Remove the variegated leaf and put it back into hot water for a few seconds to soften the leaf. Decolourized leaf Hot waterScience Form 2
  62. 62. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Procedure: 6. Spread the variegated leaf on a white tile. Add a few drops of iodine solution to test for the presence of starch.Science Form 2
  63. 63. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Observation : Discuss your observation and inference with your friends. Record your observation in a table and indicate blue-black area in your drawing. Variegated Change in colour Inference leaf Green area Non-green areaScience Form 2
  64. 64. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Discussion : 1. Which part of the variegated turned blue-black?Science Form 2
  65. 65. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Experiment 3 Conclusion : 1. State your conclusion. 2. Is your hypothesis accepted? 3. Write your report.Science Form 2
  66. 66. Topic 4 Interdependence among living Organisms and the Environment Photosynthesis Helps green plants to produce food, and to all organisms. The importance of Photosynthesis Helps to maintain a balanced level of oxygen and carbon dioxide in the atmosphere.Science Form 2
  67. 67. Topic 4 Interdependence among living Organisms and the Environment Photosyntesis Carbon cycle Combustion uses O2 and Photosynthesis releases CO2 Respiration by uses CO2 and humans, animals releases O2 and plants use O2 and releases CO2 O2 is use for the decomposition of dead organisms Decomposer Releases CO2Science Form 2
  68. 68. Topic 4 Interdependence among living Organisms and the Environment Photosyntesis Oxygen cycle Oxygen in the air is used by the plants and animals for respiration. Then, plants and animals die and decompose. Decomposition releases carbon dioxide to the air. Plants use carbon dioxide in the air to produce food through photosynthesis and release oxygen to the air.Science Form 2
  69. 69. Topic 4 Interdependence among living Organisms and the Environment Photosyntesis CLICK TO VIEW THE VIDEOScience Form 2
  70. 70. THE END Prepared by SITI HAWA BINTI MD. JAMIL SMK(P) TEMENGGONG IBRAHIM, BATU PAHAT.

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