Page 12 - Praktis Topikal A+ Sains Tg 3_Pan Asia Publications

3. Rajah di bawah menunjukkan tumbuhan membuat makanan sendiri melalui fotosintesis pada
waktu siang. Perubahan tenaga berlaku semasa proses ini.
The diagram below shows that the plant makes its own food through photosynthesis during the day. Changes in
energy happen during this process.

Cahaya matahari
Sunlight

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Oksigen
Oxygen
Karbon dioksida
Carbon dioxide

(a) Apakah jenis tindak balas yang berlaku semasa proses tersebut? TP2
What type of reaction takes place during the process?
Endotermik/ Endothermic

(b) Jelaskan jawapan anda di 3(a). KBAT Mengaplikasi
Explain your answer in 3(a).
Tumbuhan menyerap tenaga cahaya dari Matahari untuk menjalankan fotosintesis.
Plants absorb light energy from the Sun to carry out photosynthesis.

(c) Tulis persamaan perkataan bagi tindak balas tersebut. TP2
Write a word equation for the reaction.
Karbon dioksida + air + tenaga cahaya → glukosa + oksigen
Carbon dioxide + water + light energy → glucose + oxygen

(d) Apakah perbezaan antara tindak balas endotermik dengan eksotermik? KBAT Mengaplikasi
What is the difference between endothermic and exothermic reactions?
Tindak balas endotermik menyerap tenaga daripada persekitaran manakala tindak balas
eksotermik membebaskan tenaga ke persekitaran.
Endothermic reaction absorbs energy from the surrounding, while exothermic reaction releases energy to
the surrounding.

(e) Apakah contoh tindak balas eksotermik dalam tumbuhan? TP2
What is an example of exothermic reaction in plants?
Respirasi sel
Cell respiration

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