1. NOOR ZANARRIYAH MOHAMAD GANI D20091034842
SITI SHAHIDA MOHD AZIRI D20091034836
SARAH SABILLAH IBRAHIM D20091034820
ZAINAB FASIHAH MUHAMAD SUKARDI D20091034842

2. I need to cool down!

3. ENGAGE
I Need To Cool Down
During a hot and sunny day, it seems that, sitting under a tree is much
cooler compared to the surrounding that is exposed to sunlight. Why
this phenomenon occur? Explain.

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. EMPOWER
Planning and Doing Your Experiment
Part 1 : Relative Humidity and Temperature

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
59:51:00 22.231 26.825
EMPOWER
Results
Relative Humidity and Temperature
Time interval : 1minTime interval : 1min

7. 26:51 16:49 06:47 56:45 46:43 36:41 26:39
-4
-2
0
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6
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10
12
14
16
18
20
22
24
0
2
4
6
8
10
12
14
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28
30
EMPOWER
Results
Relative Humidity and Temperature

8. EMPOWER
Discussions
Relative Humidity and Temperature
1. What cause the plastic bag to turn cloudy at the end of the experiment?
2. Does the water content in plant influence transpiration rate?
3. What is the relationship between humidity and temperature in this
experiment?
4. Why we choose 1 minute as the time interval?
5. What will happen to the leaf when transpiration rate is on maximum?
6. What happen to the transpiration rate when there is high humidity?
7. What happen to the transpiration rate when there is high temperature?

9. ENHANCE
Why it is not advisable to water the plant during mid-
day? Explain this phenomenon.