Page 28 - PWR UP TG2 SAINS

Sains Tingkatan 2 Bab 2

(b) Berdasarkan rajah kitar air di atas, nyatakan peranan tumbuhan dan haiwan dalam kitar air tersebut. TP2
Based on the water cycle above, state the roles of plants and animals in the water cycle.

(i) Tumbuhan menyerap air dari tanah dan membebaskan wap air melalui transpirasi .
Tumbuhan juga membebaskan wap air melalui respirasi .

Plants absorb water from the soil and release water vapour through transpiration . Plants also release
water vapour through respiration .

(ii) Haiwan menjalankan respirasi , perkumuhan dan penyahtinjaan yang
membebaskan wap air ke persekitaran. Proses ini meningkatkan kandungan
air di atmosfera.

Animals carry out respiration , excretion and defecation that release water vapour
into the atmosphere. These processes increase the water content in atmosphere.

2. Rajah di bawah menunjukkan kitar karbon dan oksigen. SP 2.2.1
The diagram below shows a carbon and oxygen cycle.

Karbon dioksida
Carbon dioxide
Kitar Karbon dan
X Kitar Oksigen
Carbon and Oxygen
Mati Mati INFO Cycle
Dead Dead
Haiwan
Animal
Tumbuhan hijau Pengurai Kitar Karbon dan
Green plant Y Decomposers Kitar Oksigen
Carbon and Oxygen
Oksigen Z VIDEO Cycle
Oxygen

(a) Kenal pasti proses X, Y dan Z. TP2
Identify processes X, Y and Z.
X : Fotosintesis / Photosynthesis Y : Pereputan / Decomposition Z : Respirasi / Respiration

(b) Berdasarkan jawapan anda di (a), nyatakan kepentingan tumbuhan hijau, haiwan dan pengurai dalam
kitar oksigen dan karbon. TP2
Based on the answer in (a), state the importance of the green plant, animal and decomposer in the oxygen and carbon cycle.
Organisma Kepentingan
Organism Importance

Menjalankan fotosintesis dengan menggunakan karbon dioksida dan
Tumbuhan oksigen
Plant membebaskan .
Carrying out photosynthesis which uses carbon dioxide and releases oxygen .

Menjalankan respirasi dengan menggunakan oksigen dan
Animal karbon dioksida
Haiwan membebaskan .
Carrying out respiration which uses oxygen and releases carbon dioxide .

Menjalankan penguraian dengan menggunakan oksigen dan
Pengurai karbon dioksida
Decomposers membebaskan .
Carrying out decomposition which uses oxygen and releases carbon dioxide .

© Penerbitan Pelangi Sdn. Bhd. 16

02 Bab 2.indd 16 9/24/20 4:09 PM