NOOR ZANARRIYAH MOHAMAD GANI D20091034842SITI SHAHIDA MOHD AZIRID20091034836SARAH SABILLAH IBRAHIMD20091034820ZAINAB FASIHAH MUHAMAD SUKARDID20091034842

I need to cool down!

ENGAGEI 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.

EMPOWERPlanning 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

EMPOWERPlanning and Doing Your Experiment

Part 1 : Relative Humidity and Temperature

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 26.66743:51:00 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

EMPOWERResults

Relative Humidity and Temperature

Time interval : 1minTime interval : 1min

Time(mm:ss)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

EMPOWERResults

Relative Humidity and Temperature

EMPOWERDiscussions

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?

ENHANCE

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