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- 1. GROUP MEMBERS NURUL SYUHADA BT. ISHAK D20091034862 NORAZLIN BT. SALAHUDIN ABD AZIZ D20091034847 NUR IZZAH BT. IBRAHIM D20091034874 NUR ILIYANA BT. SHAFEAI D20091034868
- 3. SCIENTIFIC CONCEPT Plant Cooler Transpiration is a process loss of water in the form of water vapour from part of plant especially leaves but also in stems, flowers and roots. Leaves transpiration occur through stomata. Transpiration cools plants and enable mass flow of mineral nutrients and water from roots to shoots.
- 4. ENGAGE Plant Cooler in dark place in bright place Which plant will lose water most? Why does it happened?
- 5. EMPOWER Plant Cooler Planning And Doing Your Experiment
- 6. EMPOWER Plant Cooler Planning And Doing Your Experiment Procedure: Done the experiment in the laboratory (presence of light). Set up the apparatus as the diagram before. Place the humidity sensor inside the plastic bag and wrapped around a branch of the plant. Set the data logger. Start the data logger and record the result for 16 hours. Repeat the experiment by place the plant at the different place that are inside the cupboard (absence of light).
- 7. EMPOWER Plant Cooler RESULT TABLE OF HUMIDITY INSIDE THE LABORATORY
- 8. EMPOWER Plant Cooler RESULT Time (s) Humidity I/O-1% 0 0 23.968 1 1 23.81 2 2 23.968 3 3 24.127 4 4 24.289 5 5 24.444 6 6 24.444 7 7 24.444 8 8 24.603 9 9 24.603 10 10 24.762 Time (s) Humidity I/O-1% 19 19 24.921 20 20 25.238 21 21 25.238 22 22 25.238 23 23 25.238 24 24 25.238 25 25 25.079 26 26 25.397 27 27 25.397 28 28 25.397 29 29 25.556
- 9. EMPOWER Plant Cooler RESULT Time (s) Humidity I/O-1% 257 257 25.873 258 258 26.032 259 259 25.873 260 260 26.032 261 261 26.032 262 262 26.19 263 263 26.032 264 264 26.032 265 265 26.032 266 266 26.873 267 267 26.873 Time (s) Humidity I/O-1% 406 406 26.984 407 407 27.143 408 408 27.143 409 409 27.143 410 410 27.143 411 411 26.984 412 412 27.143 413 413 26.984 414 414 27.143 415 415 27.143 416 416 27.143
- 10. EMPOWER Plant Cooler RESULT Time (s) Humidity I/O-1% 619 619 27.937 620 620 28.095 621 621 28.095 622 622 28.095 623 623 28.095 624 624 28.095 625 625 28.095 626 626 28.254 627 627 28.095 628 628 28.095 629 629 28.254
- 11. EMPOWER Plant Cooler RESULT GRAPH OF HUMIDITY INSIDE THE LABORATORY
- 12. Time(mm:ss) 36:13 16:09 56:05 36:01 15:58 55:54 35:50 15:46 55:42 35:38 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
- 13. EMPOWER Plant Cooler RESULT TABLE OF HUMIDITY INSIDE THE CUPBOARD
- 14. EMPOWER Plant Cooler RESULT Time (s) Humidity I/O-1% 0 0 23.175 1 1 24.127 2 2 25.079 3 3 25.556 4 4 26.032 5 5 26.349 6 6 26.667 7 7 26.825 8 8 26.984 9 9 26.984 10 10 27.302 Time (s) Humidity I/O-1% 11 11 27.46 12 12 27.619 13 13 27.619 14 14 27.619 15 15 27.778 16 16 27.937 17 17 28.095 18 18 28.254 19 19 28.095 20 20 28.254 21 21 28.413
- 15. EMPOWER Plant Cooler RESULT Time (s) Humidity I/O-1% 22 22 28.413 23 23 28.413 24 24 28.413 25 25 28.571 26 26 28.571 27 27 28.571 28 28 28.571 29 29 28.73 30 30 28.73 31 31 28.73 32 32 28.571 Time (s) Humidity I/O-1% 56 56 28.889 57 57 29.048 58 58 29.048 59 59 28.889 60 60 29.206 61 61 29.048 62 62 29.048 63 63 29.048 64 64 29.048 65 65 29.048 66 66 29.048
- 16. EMPOWER Plant Cooler RESULT GRAPH OF HUMIDITY INSIDE THE CUPBOARD
- 17. Time(mm:ss) 02:06 42:02 21:58 01:55 41:51 21:47 01:43 41:39 21:35 01:31 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
- 19. EMPOWER Plant Cooler Discussion Questions 1.Compare the two graph and describe the differences between them. 2.Was there any visible sign of water loss in the experiment? Describe what you have seen. 3.Does the presence of light have any effect on how humidity rises? 4.What are the different in humidity rise when there was a presence of light or not? 5.Why transpiration important to plants?
- 20. ENHANCE Plant Cooler Early in the morning, you can find water droplets at the tip of the leaves. Why does this has happen??? Discuss with your friends.
- 21. ENHANCE Plant Cooler Answer :- At night, water vapor cannot move out from the stomata because most plants have their stomata closed. When there is high soil moisture level, water will enter the plant root. The water will accumulate in the plant, creating a slight root pressure. The root pressure forces some water to exude through special leaf tip or edge structure and forming drops that are water droplet.
- 22. Unique Feature of This Activity The apparatus that we use was only the humidity sensor, plant and plastic bag. So, less time taken to set up the apparatus. We can stopped the data logger whenever we want because before start the experiment, we had set the time and when the time for the experiment had finished it will stopped automatically. The changes in humidity cannot be detected by our naked eyes. So, by using the data logger the reading of humidity can be record every one minutes per hour.
- 23. THANK YOU =)