Page 21 - PBD Plus Biologi T5 (EG)

Biologi Tingkatan 5 Bab 2

Prosedur / Procedure:
1. Radas seperti dalam rajah di atas disediakan.
The apparatus in the diagram above are set up.
2. Hujung pucuk ranting pokok bunga raya dipotong di dalam air.
The hibiscus leafy shoot is cut under the water.
3. Masih di dalam air, pucuk yang telah dipotong disambung kepada penyumbat gabus yang telah
disambung dengan tiub kapilari.
Still in the water, the cut shoot is connected to the cork stopper that has been connected to the capillary tube.
4. Radas dikeluarkan daripada air dan pucuk dikepit pada kaki retort.
The apparatus is taken out from the water and the shoot is clamped to the retort stand.
5. Hujung tiub kapilari direndamkan di dalam bikar yang berisi air berwarna.
The end of capillary tube is immersed into a beaker containing coloured water.
6. Hujung tiub kapilari diangkat untuk memerangkap gelembung udara di bawah. Selepas 10 minit, jarak
pergerakan gelembung udara di dalam potometer diukur menggunakan pembaris.
The end of capillary tube is raised to collect the air bubble at the bottom. After 10 minutes, the distance travelled by air bubble inside
the photometer is measured by using ruler.
7. Eksperimen dijalankan dalam keamatan cahaya rendah dan tinggi, pada kelajuan kipas 0 dan kelajuan
kipas 3, kelembapan udara relatif rendah dan tinggi serta suhu rendah dan tinggi.
The experiment is carried out under lower light intensity and higher light intensity, under still air and fast moving fan, low and high
relative air humidity and low and high temperature.
8. Kadar transpirasi dikira dengan menggunakan rumus berikut:
The rate of transpiration is being calculated by using the following formula:
Jarak pergerakan gelembung udara (cm)
Kadar transpirasi Distance travelled by air bubble (cm)
=
Penerbitan Pelangi Sdn. Bhd
Rate of transpiration
Masa (min)
Time (min)
Keputusan / Result:
Jarak pergerakan Kadar transpirasi

Faktor persekitaran gelembung udara dalam (cm min )
-1
Environmental factor masa 10 minit (cm) Transpiration rate
Distance travelled by air bubble in (cm min )
-1
10 minutes (cm)
(a) Keamatan cahaya Rendah / Low
Light intensity
Tinggi / High

(b) Pergerakan udara Perlahan / Slow (Jawapan murid / Student's answer)
Air movement
Laju / Fast

(c) Kelembapan relatif udara Rendah / Low
Relative air humidity
Tinggi / High

(d) Suhu Rendah / Low
Temperature
Tinggi / High

TAHAP PENGUASAAN 1 2 3 4 5 6 31 © Penerbitan Pelangi Sdn. Bhd.

02 PBD PLUS BIOLOGY TG5.indd 31 25/11/2022 10:14 AM