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Data logging

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Data logging Data logging Presentation Transcript

  • Azma amira bt mohamad Noor asyikin bt kamarazaman Syanawiyyah bt Md Zin Wan norfarhah bt wan harun.
      • The intensity of light is a factor which affects the rate of photosynthesis. Low light intensity would produce a low rate of photosynthesis. An increase in light leads to a higher rate of photosynthesis. Once the light intensity reaches 10 000 lux, the photosynthesis rate becomes constant.
  • 1-which plant is more fresh after several days?? 2- Why this happen? plant cover by dark box plant not cover by dark box Plant A Plant B Plant A Plant B
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  • Tabulated data Time(mm:ss) CO2 I/O-1(ppm) CO2 I/O-2(ppm) 33:09:00 876.308 551.385 34:09:00 925.538 571.077 35:09:00 925.538 580.923 36:09:00 955.077 620.308 37:09:00 964.923 620.308 38:09:00 994.462 659.692 39:09:00 1024 649.846 40:09:00 1043.692 679.385 41:09:00 1073.231 669.538 42:09:00 1132.308 699.077 43:09:00 1132.308 689.231 44:09:00 1171.692 718.769 45:09:00 1211.077 708.923 46:09:00 1220.923 758.154 47:09:00 1280 748.308 48:09:00 1309.538 777.846 49:09:00 1358.769 777.846 50:09:00 1417.846 777.846 51:09:00 1447.385 797.538 52:09:00 1486.769 787.692 53:09:00 1545.846 807.385 54:09:00 1555.692 807.385 55:09:00 1604.923 836.923 56:09:00 1644.308 827.077 57:09:00 1664 846.769
  • Red line = high light intensity Blue line = low light intensity
    • Compare the rate of dissolve oxygen for both of the plant.
    • Why the both graph keep increasing?
    • What is the effect of light intensity towards the rate of photosynthesis?
    • State the another factor that influence the rate of photosynthesis?
  • Plant in the house Plant at the backyard
    • The plant in the house is wilt while the plant in the backyard is healthy.
    • The color of the leaves of taro in the house turned to brownish after a few weeks while the taro in the backyard maintains its green color.
    • The stem of taro in the backyard is bigger and taller than the stem of taro in the house.
    • The results gain is more accurate rather than using manual method due to the same time interval
    • The experiment can be continued for many hours until the rate of photosynthesis reaching its optimum level. This experiment is almost impossible done by traditional method because students have to sit for many hours to count the O 2 bubbles released by the elodea plant.
    • The change in photosynthesis cannot be detected by naked eyes but by using data logger, we can record the rate of photosynthesis every one minute per half an hour.
    • Using data logging, we can save the time by setting up more than one apparatus can be done simultaneously at the same time.