Page 75 - APS(2022)_TG1 _Edisi Guru

Sains Tingkatan 1 Bab 2
Tarikh:

EKSPERIMEN 2.9 Tenaga Cahaya Diperlukan untuk Fotosintesis
Wajib Light Energy is Needed for Photosynthesis Pendekatan inkuiri

Tujuan Menunjukkan cahaya matahari diperlukan untuk fotosintesis
Aim To show that sunlight is needed for photosynthesis

Pernyataan Adakah tenaga cahaya diperlukan untuk fotosintesis?
BAB
Masalah Is light energy needed for photosynthesis?
Problem statement
2
Hipotesis Cahaya diperlukan untuk fotosintesis.
Hypothesis
Light is needed for photosynthesis.

Pemboleh Ubah (a) yang dimanipulasikan : Kehadiran cahaya matahari
Variables
that is manipulated Presence of sunlight
(b) yang bergerak balas : Kehadiran kanji
that is responding Presence of starch
(c) yang dimalarkan : Jenis daun, jumlah air

that is kept constant Type of leaf, quantity of water

Bahan Tanaman pasu, larutan iodin, alkohol, klip kertas dan kertas hitam
Materials Potted plant, iodine solution, alcohol, paper clips and black paper

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

Klip kertas
Paper clip

C
A A
Video B Kertas hitam
Black paper

Prosedur 1. Simpan tanaman pasu dalam keadaan gelap selama dua hari.
Procedure Keep a potted plant in the dark for two days.

2. Pilih sehelai daun daripada tumbuhan tersebut.
Choose a leaf from the plant.
3. Tutup sebahagian daripada daun dengan sehelai kertas hitam menggunakan klip kertas
seperti yang ditunjukkan dalam rajah.
Cover a part of the leaf with a piece of black paper using paper clips as shown in the diagram.
4. Dedahkan pasu tersebut di bawah cahaya matahari selama tiga jam.
Expose the pot under the sunlight for three hours.
5. Petik daun yang ditutup dengan kertas hitam untuk menjalankan ujian kanji.
Pluck the leaf covered with black paper to test the presence of starch.

Kaedah 1. Tanaman pasu disimpan dalam keadaan gelap selama dua hari.

Method
A potted plant was kept in the dark for two days.
2. Sehelai daun dipilih daripada tumbuhan tersebut.

A leaf was chosen from the plant.

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02 APS SAINS TG1.indd 42 21/07/2021 8:37 AM