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JSS2: BASIC TECHNOLOGY - 1ST TERM
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Definition of First Aid | Week 17 Topics|1 Quiz
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Rescue Operation | Week 23 Topics|1 Quiz
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Materials & Their Common Uses (Wood) | Week 36 Topics|1 Quiz
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Materials & their Common Uses (Metal) | Week 45 Topics|1 Quiz
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Uses of Common Alloys ( Brass & Bronze) | Week 5 & 68 Topics|1 Quiz
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Uses of Ceramics And Glass (Contd) | Week 7 & 84 Topics|1 Quiz
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Uses of Plastics | Week 94 Topics|1 Quiz
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Uses of Rubber | Week 103 Topics|1 Quiz
Lesson 3,
Topic 6
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Disadvantages of Using Wood
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1. Wood is highly combustible.
2. Wood is susceptible to disease and rot.
3. Water and heat can change the dimension of wood. So, wood is dimensionally unstable.
4. Wood cannot be used at high temperatures.
5. When wet, wood strength decreases.
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