Page 6 - Grab A+ Kertas Model SPM Sains

2. Satu eksperimen telah dijalankan untuk menyelidik darjah pencemaran udara di tiga kawasan perindustrian. Tiga slaid
kaca dengan pita selofan masing-masing diletakkan di kawasan M, N dan P daripada pukul 9:00 pagi hingga 1:00 petang.
Selepas seminggu, slaid kaca diperhatikan. Rajah 2 menunjukkan keputusan eksperimen yang diperoleh.
An experiment was carried out to investigate the degree of air pollution in three industrial areas. Three glass slides with
cellophane tape were placed in areas, M, N and P from 9:00 am until 1:00 p.m. After one week, the glass slides were
observed. Diagram 2 shows the results of the experiment obtained.

Pita selofan Zarah habuk Zarah habuk Pita selofan Zarah habuk Pita selofan
Cellophane tape Dust particles Dust particles Cellophane tape Dust particles Cellophane tape

Slaid kaca Slaid kaca
Kawasan M Glass slide Kawasan N Glass slide Kawasan P
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Area M Area N Area P
Rajah 2 / Diagram 2
(a) Nyatakan satu pemerhatian berdasarkan Rajah 2.
State one observation based on Diagram 2.

[1 markah / 1 mark]
(b) Nyatakan satu inferens bagi eksperimen ini.
State one inferens for this experiment.

[1 markah / 1 mark]
(c) Nyatakan pemboleh ubah bagi eksperimen ini.
State the variables in this experiment.
(i) Pemboleh ubah dimanipulasikan/ Manipulated variable.

[1 markah / 1 mark]
(ii) Pemboleh ubah bergerak balas/ Responding variable.

[1 markah / 1 mark]
(d) Berdasarkan eksperimen ini, nyatakan definisi secara operasi bagi pencemaran udara.
Based on this experiment, state the operational definition of air pollution.

[1 markah / 1 mark]

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