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Grade 5 | Science | Material, Matter and Materials, Olympiad, CBSE, ICSE, Maths Olympiad, Science Olympiad, English Olympiad
Biodegradable: Anything which can be decomposed back to the soil by bacterias or other living organisms. Bio-degradable things do not cause pollution and harm to nature. e.g. wood
Non-biodegradable: Anything which cannot be decomposed back to the soil. Non-biodegradable waste causes pollution and harm to nature. e.g. plastic
Material | Properties | Usages |
Paper | Lightweight, flexible, bio-degradable, derived from plants, can't resist fire | Books, newspapers, envelopes, kites |
Rubber | Waterproof, very flexible, elastic in nature, derived from plants, low melting point, melts easily at high temperatures | Shoe base, tyres, toys |
Metals | Strong, durable, hard, good conductor of heat, Heats up and cools down rapidly, non-biodegradable | Farming instruments, kitchen utensils and instruments, kettles, pots |
Glass | Transparent, brittle, waterproof | window panes, windows shields, mirror etc |
Plastic | Durable, flexible, strong, light, bad conductor of heat, low melting point, melts easily at high temperatures, derived from petroleum products and coal, non-biodegradable | Toys, household things |
Wood | Strong, not much flexible, light, derived from plants, bio-degradable, bad conductor of heat, heat does not pass through it easily | doors and windows, furniture, handles of pots and kettles |
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