Page 55 - PWR UP TG3 SAINS

Sains Tingkatan 3 Bab 8
(a) Ramalkan masa yang diambil oleh lilin dalam tabung gas B untuk padam. Wajarkan ramalan anda.
Predict the time taken in the gas jar B to go o . Justify your prediction.

Kurang daripada 8 saat. Pembakaran lilin memerlukan oksigen. Mengandungi kandungan oksigen yang
lebih rendah berbanding udara sedutan. // Less than 8 minutes. The combustion of candle needs oxygen. Contain less

oxygen content compare to inhaled air.
[3 markah / 3 marks]
(b) Udara sedutan mungkin mengandungi bahan terampai seperti habuk. Sesetengah orang mengalami
alahan terhadap habuk dalam udara yang disedutnya.
Inhaled air might contain suspended substances such as dust. Certain people are allergic to the dust in the air they breathe in.

(i) Alice keluar bersiar-siar di dalam taman yang penuh dengan bunga-bungaan yang berkembang
mekar. Beberapa minit kemudian, Alice mula bersin berulang kali. Dapatkah anda jelaskan apa yang
berlaku kepada Alice?

Alice went for a walk in a garden which was fulled of blooming owers. A few minutes later, she started to sneeze repeatedly. Can
you explain what happened to Alice?
Pesakit asma // Alahan terhadap debu. Butir debunga berterbangan. Disedut masuk ke dalam

rongga hidung. Merangsang sel-sel deria bau. Su ered from asthma // Allergy to dust. The pollens are in the
air. Inhaled into the nasal cavity. Stimulate the smell sensory cell.
[3 markah / 3 marks]
(ii) Apakah amalan yang sepatutnya Alice lakukan apabila pergi bersiar-siar di taman bunga?
What practice should be done by Alice when she goes for a walk in the garden?

Pakai topeng // menggunakan kain untuk menutup hidung
Wear a mask // use handkerchief to cover the nose
[1 markah / 1 marks]

(c) Seorang penunggang motorsikal telah mengalami kemalangan dan cedera parah di bahagian dadanya
akibat terhempas. Dia telah dikejarkan ke hospital tetapi meninggal dunia sebaik sampai di hospital.
Laporan bedah siasat mengesahkan mangsa gagal bernafas kerana mengalami kecederaan otot
diafragma akibat tertusuk tulang rusuk yang patah.

A motorcyclist met with an accident and seriously su ered from chest injury due to a crash. He was rushed to the hospital but died

shortly after arriving at the hospital. The autopsy report con rmed that the victim had failed to breathe due to a diaphragm muscle
injury as a result of stabbed by the broken ribs.
Diafragma rosak. Isi padu rongga torak tidak boleh berubah. Tekanan udara tidak boleh berubah.

Pergerakan keluar masuk udara tidak boleh berlaku. The diaphragm has damaged. The volume of the thoracic cavity

cannot be changed. The air pressure in the thoracic cavity cannot be changed. The movement of air in and out cannot happen.
[3 markah / 3 marks]

Kuiz 2

Praktis TIMSS/PISA

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