Data logger presentation

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Data logger presentation

  1. 1. NOOR ZANARRIYAH MOHAMAD GANI D20091034842 SITI SHAHIDA MOHD AZIRI D20091034836 SARAH SABILLAH IBRAHIM D20091034820 ZAINAB FASIHAH MUHAMAD SUKARDI D20091034842
  2. 2. I need to cool down!
  3. 3. ENGAGE I Need To Cool Down Study this picture, where does the water in the pot go? Explain.
  4. 4. EMPOWER Planning and Doing Your Experiment Part 1 : Relative Humidity and Temperature Data loggerData logger Plastic bagPlastic bag Humidity sensorHumidity sensor Temperature sensorTemperature sensor Retort standRetort stand ComputerComputer
  5. 5. EMPOWER Planning and Doing Your Experiment Part 1 : Relative Humidity and Temperature
  6. 6. Time(mm:ss) Temperature I/O-1(°C) Humidity I/O-2(%) 26:51:00 22.536 26.984 27:51:00 22.536 27.143 28:51:00 22.739 27.302 29:51:00 22.739 27.302 30:51:00 22.941 27.302 31:51:00 22.941 27.302 32:51:00 22.941 27.143 33:51:00 22.941 27.46 34:51:00 23.043 27.143 35:51:00 22.941 27.302 36:51:00 23.043 27.302 37:51:00 22.941 27.143 38:51:00 22.941 27.302 39:51:00 22.84 27.143 40:51:00 22.84 27.143 41:51:00 22.637 26.984 42:51:00 22.536 26.667 43:51:00 22.333 26.825 44:51:00 22.333 26.984 45:51:00 22.434 27.143 46:51:00 22.434 26.984 47:51:00 22.434 27.143 48:51:00 22.637 27.143 49:51:00 22.637 27.143 50:51:00 22.434 26.984 51:51:00 22.536 26.984 52:51:00 22.536 27.143 53:51:00 22.536 27.143 54:51:00 22.434 26.984 55:51:00 22.434 27.143 56:51:00 22.434 26.984 57:51:00 22.333 27.143 58:51:00 22.434 26.984 EMPOWER Results Relative Humidity and Temperature
  7. 7. 26:51 16:49 06:47 56:45 46:43 36:41 26:39 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 EMPOWER Results Relative Humidity and Temperature
  8. 8. EMPOWER Disccussion Relative Humidity and Temperature 1. What cause the plastic bag to turn cloudy at the end of the experiment? 2. What triggers the water to be expelled from the plant? 3. Where does the water which has been expelled come from? 4. Which structure in the leaf helps to draw water out? 5. Which structure helps to control the opening and closing of stomata? 6. How does transpiration takes place? 7. What is the difference between transpiration that takes place during the day and night ? 8. In your opinion, if the plant is in wilt condition, does transpiration still take place? Why? 9. Does the water content in plant influence transpiration rate? 10. What are other factors which may influence transpiration to occur? 
  9. 9. EMPOWER Answers to Discussion Relative Humidity and Temperature 1. There were water droplets in the bag. The bag may appear cloudy because of water vapor in the bag. 2. The inner side of the plant is in hot condition. Thus, to make it cooler the plant has to expelled the water out from its body. 3. The water comes from the soil. The uptake of water from the soil is via osmosis, then the water enters neighbouring cells until it reached the pore. 4. The structure which responsible in drawing the water out is stomata. Stomata are a special type of pore opening on leaves of plants. They are designed to absorb water from sources such as rain while also removing excess water in the plant through transpiration
  10. 10. 5. The regulation of opening and closing of stomata is controlled by guard cell. It is one of the paired cells in the epidermis of a plant that control the opening and closing of a stoma of a leaf. When swollen with water, guard cells pull apart from each other, opening the stoma to allow the escape of water vapour and the exchange of gases. When drier, guard cells become more flaccid and move closer together, allowing the plant to conserve water. 6. When the plant has too much water, the guard cells open and permit the stomata to release water into the air. This water is replaced by the movement of water from neighbouring cells. Eventually water is pulled up the plant through cells in the trunk or stem by capillary action. 7. On a sunny day the guard cells are open and water vapour escapes through the stomata. At night the guard cells are partially or completely closed and little water escapes.
  11. 11. 8. No. This is because there is no supply of water from the soil and stomata are closed. Furthermore the wilt plant needs to conserve water until the plant become turgid again. 9. Yes. The water content does influence the transpiration rate. The greater the water content in the plant body, the higher will be the transpiration rate. 10. Transpiration is actually being influenced by environmental factors. There are 5 factors altogether which are light, wind, relative humidity, temperature and soil water.
  12. 12. ENHANCE Have you ever seen this phenomenon before. Why does this man is sweating a lot? Explain

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