Page 91 - APS(2022)_TG1 _Edisi Guru

Sains Tingkatan 1 Bab 3
Tarikh:

AKTIVITI 3.4 Homeostasis dalam Tumbuhan
Perbincangan Homeostasis in Plants
Masteri

1. Apakah itu transpirasi? TP 1
What is transpiration?
Transpirasi ialah proses kehilangan air dalam bentuk wap air melalui penyejatan
daripada permukaan daun tumbuhan.
Transpiration is the process of losing water in the form of water vapour through evaporation from the
surface of plants’ leaves.

2. Wap air keluar ke persekitaran melalui liang pada epidermis daun yang disebut stoma . TP 1
Water vapour moves out to the surrounding through a pore in the epidermis of leaf called stoma .
BAB
3. Struktur daun yang manakah mengawal saiz liang stoma? TP 1
Which structure of leaf controls the size of stoma?
3
Sel-sel pengawal / Guard cells

4. Lengkapkan peta alir di bawah tentang proses transpirasi. TP 4 Menganalisis
Complete the flow map below regarding transpiration process.

Diangkut Air Wap Permukaan Akar
Transported Water Vapour Surface Root

- THINK

Akar tumbuhan menyerap
Air dan mineral diangkut melalui
air dan mineral dari tanah. salur xilem dari batang ke daun.

Roots of plants absorb Water and minerals are transported through
water and minerals from the soil. the xylem vessels up the stem to the leaves.

Tumbuhan kehilangan air daripada permukaan
daun ke persekitaran dalam bentuk wap air.

Plants lose water from the surface of leaves to the
surrounding in the form of water vapour .

5. Nyatakan satu peranan lain transpirasi dalam tumbuhan selain daripada menyejukkan tumbuhan ketika
cuaca panas. TP 2
State one other role of transpiration in plants besides cooling down the plants during hot days.

Mengangkut air dan garam mineral terlarut dari akar ke seluruh tumbuhan.
Transports water and mineral salts from the roots to the whole plant.

Aktiviti Interaktif
Transpirasi
Transpiration

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