Page 57 - SCIENCE DLP T6 SK (SEMAKAN 2017)

1. Microorganisms are very small living things that cannot be seen with our
naked eyes.

2. There are five types of microorganisms:
• fungi
• bacteria
• algae
• protozoa
• virus

3. The life processes of microorganisms are as follows:
• breathe
• move
• grow

4. Factors that affect the growth of microorganisms are as follows:
• suitable temperature
• presence of water
• presence of air
• presence of nutrients
• suitable acidity

5. The actions of microorganisms have the following effects:

Benefit Harm
• manufacture of food products • cause food spoilage
• production of medicine • cause tooth decay

• production of organic fertilisers • cause food poisoning
8.2.6
• treatment of sewage
8.2.7 • cause damage to plants
• cause infectious diseases

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