1. Azma amira bt mohamad
Noor asyikin bt kamarazaman
Syanawiyyah bt Md Zin
Wan norfarhah bt wan harun.

2. 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.

3. 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 BPlant A Plant B

5. Lamp

9. 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
Tabulated dataTabulated data

10. Time(mm:ss)
33:09 38:09 43:09 48:08 53:08
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Red line = high light intensity
Blue line = low light intensity

11.  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?

12. Plant in the house Plant at the backyard

13.  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.

14.  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 O2 bubbles released by the elodea
plant.

15.  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.