Please refer to the Synthetic Fibres and Plastics Notes Class 8 Science given below. These revision notes have been designed as per the latest NCERT, CBSE, and KVS books issued for the current academic year. Students will be able to understand the entire chapter in your class 8 th Science book. We have provided chapter-wise Notes for Class 8 Science as per the latest examination pattern.
Revision Notes Chapter 3 Synthetic Fibres and Plastics Class 8 Science
Students of Class 8 Science will be able to revise the entire chapter and also learn all important concepts based on the topic-wise notes given below. Our best teachers for Grade 8 have prepared these to help you get better marks in upcoming examinations. These revision notes cover all important topics given in this chapter.
Very Short Answer Type Questions
Question. Name two objects made of Nylon fibre showing the strength of Nylon fibre.
Answer : Parachutes and ropes of rock climbing are made of nylon
Question. Write two uses of Plastic containers to store food products.
Answer : 1. Because plastic is cheap and durable.
2. It is non-reactive and will not react with the ingredients of the food items.
Question. Write any two differences between thermosetting plastic and thermoplastic.
|It Cannot be bent, it will break if we attempt to bend thermo setting plastic
|Thermoplastic can be bent easily
|On heating thermosetting plastics, it cannot be softened. This is the reason it cannot be reshaped once it is molded.
|On heating the thermoplastics, it becomes softened and can be molded and reshaped easily.
Question. Give two examples of thermoplastics.
Answer : Polythene and Poly Vinyl Chloride
Question. How will you identify Natural fibres and Synthetic fibres?
Answer : Natural fibres are obtained from natural sources e.g. Cotton, silk, wool etc. Synthetic fibres are man-made e.g. rayon, nylon, acrylic etc.
Question. What do you mean by polymers?
Answer : A polymer is a very big molecule formed by the combination of a large number of small molecules e.g. polythene.