Page 78 - APS(2022)_TG1 _Edisi Guru

Sains Tingkatan 1 Bab 2
Tarikh:
EKSPERIMEN 2.11 Air Diperlukan untuk Fotosintesis
Wajib Water is Needed for Photosynthesis Pendekatan inkuiri

Tujuan Menunjukkan air diperlukan untuk fotosintesis
Aim To show that water is needed for photosynthesis 2
Pernyataan Adakah air diperlukan untuk fotosintesis?
Masalah Is water needed for photosynthesis? BAB
Problem statement
Hipotesis Air diperlukan untuk fotosintesis. / Water is needed for photosynthesis.
Hypothesis
Pemboleh Ubah (a) yang dimanipulasikan / that is manipulated : Kehadiran air / Presence of water
Variables
(b) yang bergerak balas / that is responding : Kehadiran kanji / Presence of starch
(c) yang dimalarkan / that is kept constant : Saiz daun dan jenis tumbuhan
Size of leaf and type of plant
Bahan 2 tanaman pasu, air, larutan iodin dan alkohol
Materials 2 potted plants, water, iodine solution and alcohol

Radas Bikar, penunu Bunsen, tabung uji, rod kaca, kasa dawai, tungku kaki tiga, jubin putih, penitis
Apparatus dan forseps
Beakers, Bunsen burner, test tube, glass rod, wire gauze, tripod stand, white tile, dropper and forceps

Prosedur 1. Letakkan kedua-dua tanaman pasu A dan B di bawah matahari.
Procedure Keep both potted plants A and B under the sunlight.
2. Siram pasu A setiap hari dengan air. Manakala, pasu B tidak disiram.
Water the plant in pot A daily. Whereas, pot B is not watered.
3. Selepas 7 hari, petik sehelai daun daripada kedua-dua pasu dan lakukan ujian kanji.
After 7 days, pluck a leaf from both pots and test for the presence of starch.

Kaedah 1. Kedua-dua tanaman pasu A dan B diletakkan di bawah matahari.
Method
Both potted plants A and B were kept under the sunlight.

2. Pasu A disiram dengan air setiap hari. Manakala, pasu B tidak disiram.
The plant in pot A was watered daily. Whereas, pot B was not watered.

3. Sehelai daun dipetik daripada kedua-dua pasu selepas 7 hari dan ujian kanji dilakukan.
A leaf was plucked from both pots after 7 days and the presence of starch was tested.

Pemerhatian
Observation Pasu Keadaan daun Ujian kanji
Pot Condition of leaf Starch test
A Segar / Fresh Daun bertukar menjadi biru tua / Leaf turns blue-black

B Layu / Wilt Daun bertukar menjadi perang / Leaf turns brown

Perbincangan 1. Nyatakan inferens bagi pemerhatian pada: TP 2
Discussion State the inference for the observation on:
:
(a) Pasu A Daun bertukar menjadi biru tua semasa ujian kanji kerana fotosintesis berlaku
Pot A : The leaf turns brown during starch test because photosynthesis takes place
(b) Pasu B : Daun bertukar menjadi perang semasa ujian kanji kerana
fotosintesis tidak berlaku
Pot B : The leaf turns brown during starch test because photosynthesis does not take place

Kesimpulan Air diperlukan untuk fotosintesis. Hipotesis diterima .
Conclusion
Water is needed for photosynthesis. The hypothesis is accepted .

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02 APS SAINS TG1.indd 45 21/07/2021 8:37 AM