Friday , March 29 2024

Science

NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics – Quiz

Synthetic Fibres and Plastics

NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics – Quiz 25 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics – Quiz: Human-made materials are obtained from natural raw materials by chemical processes. Polymers are materials with long chain molecules containing thousands of smaller molecules …

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NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics

Synthetic Fibres and Plastics

Question: Give two examples each of natural and synthetic fibres. Answer: Natural fibres: Cotton, Silk Synthetic fibres: Rayon, Nylon Question: What is a polymer? Answer: Synthetic fibres are made up of molecules called polymers. Polymers are huge molecules-usually consisting of long chains made from thousand of similar small molecules called monomers. …

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NCERT 8th Class (CBSE) Science: Microorganisms – Quiz

Microorganisms

NCERT 8th Class (CBSE) Science: Microorganisms – Quiz 24 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Microorganisms – Quiz: Organisms that are small and can be seen only through a microscope are called microorganisms or microbes. They are present all round us and also inside our bodies. Microorganisms belong …

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NCERT 6th Class (CBSE) Science: Garbage In, Garbage Out

Garbage In, Garbage Out

Question: Distinguish between bio-degradable and non bio-degradable. Answer: Biodegradable waste: Waste that will decay and mix with soil. Microorganisms can convert this waste into simpler from. Peels, meat, leaves are the example. Non biodegradable wast: Waste that will not decay and mix soil. Microorganisms cannot convert this waste into simpler …

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NCERT 6th Class (CBSE) Science: Fun with Magnets

Magnets

Question: Why does a freely suspended magnet point in the north-south direction? Answer: It is believed that earth behaves like a big bar magnet with it south pole towards geographical north-pole. That’s why a freely suspended magnet points in north-south directions. Question: Briefly explain the properties of magnet. Answer: The properties …

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