Page 25 - Mahir PBD KSSR 2022 Thn 6 - Science

Science Year 6 Unit 3 Microorganisms
(b) Are all the microorganisms beneficial to humans?
Tick (✓) in the box below.

Yes ✓ No

Give your reason.
Penerbitan Pelangi Sdn Bhd. All Rights Reserved.
Ada juga mikroorganisma yang memberikan keburukan kepada manusia seperti
bakteria yang boleh menyebabkan pereputan gigi dan kerosakan makanan.
[1 mark]
(c) Besides food production, state another use of microorganisms.
Pembuatan baja organik/ Penghasilan antibiotik dan vaksin
[1 mark]

Praktis
Praktis
HOTS Practice
Practice
HOTS Practice
The diagram below shows the recipe used by Amirah and Masyitah to make bread dough.
They mixed flour, warm water, yeast and sugar into a bowl and mixed the mixture until it
became dough.

Amirah: Masyitah:
• 250 g wheat flour • 250 g wheat flour
• 100 ml of warm water • 100 ml of warm water
• 15 g yeast • 25 g yeast
• 2 big tablespoons of sugar • 2 big tablespoons of sugar

They found that the bread mixture mixed with yeast rose. Once the mixture is baked, they
found that there are air holes on the bread. Why did this happen?

Adunan roti menjadi kembang kerana yis bernafas dan membebaskan karbon dioksida.
Gas-gas ini terperangkap di dalam doh dan menyebabkan rongga-rongga udara terbentuk.

Apabila adunan roti dibakar, gas yang terperangkap tadi mengembang dan adunan
menjadi masak dan akhirnya rongga-rongga kekal dalam roti yang telah masak.

35 © Penerbitan Pelangi Sdn. Bhd.

03 Mahir Science Year 6.indd 35 15/03/2022 11:08 AM