CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets with Answers - Chapter 3 - PDF
FAQs on CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets
1. How would you describe Synthetic fibres following concepts discussed in chapter 3 of CBSE class 8 Science?
The CBSE NCERT books have been designed in such a way that it makes it easier for the Class 8th student to grasp the chapter in a small period of time. Synthetic fibres are usually delineated as man-made fibres and therefore this is a reason why it is described as Synthetic fibre. This synthetic fibre is like a chain of small units and they get combined together to form a larger unit known as Polymer. The Greeks were the ones who discovered this word, the polymer which has been formed from two words and they are “poly” which refers to the meaning and the other word is “me”or refers to the part or unit. So, the formation of this polymer is based on the chains of small units or parts that lead to the formation of the polymers.
2. How many types of repeating units exist in CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets?
The CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets have been set up in such a way to make the pattern of syllabus easier for the student and they would be able to score higher and better. But for this, they need to prepare for the examination very carefully with a proper plan. The experts recommend the CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets as one of the methods to get better scores. There are many types of repeating units that exist in CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets and they have been mentioned below:
Rayon: The scientists had discovered Rayon in the 19th century which is also known as artificial silk. Rayon originated from wood pulp but still is considered to be a man-made fibre. It is more in use because it is cheaper than silk.
Nylon: The discovery of nylon was in 1931 when it was being manufactured from coal, water as well as air. This is the first fully man-made synthetic fibre. The fibre of nylon was strong, elastic as well as light. It is easily washable and lustrous in appearance. Nylon is used in the manufacturing of socks, tents, toothbrushes, curtains, sleeping bags, etc.
Polyester and Acrylic: Another man-made synthetic fibre is polyester. The basic advantage of using polyester is that it doesn't get wrinkled. It is easily washable and remains crisp. The very popular form of polyester is terylene and PET (polyethylene terephthalate) is one of the popularly known polyesters. It is used widely in the making of bottles, films, wires, utensils, etc.
Acrylic: It is also one of the man-made synthetic fibres which are used widely in the manufacturing of sweaters, shawls, blankets, etc.
3. What is plastic and its types and characteristics in the CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets?
The CBSE Class 8 Science Synthetic Fibres and Plastics Worksheet is one of the valuable sources of knowledge for the students of Class 8th to understand man-made fibre in detail. In order to understand the man-made fibre in detail then Vedantu is considered to be the best website for getting all the updated documents in pdf format.
Plastic is considered to be a kind of polymer that can be recycled, reused, coloured, moulded, or drawn into wires or in different kinds of shapes. There is the existence of two kinds of plastics:
Thermoplastic: This is a kind of plastic that can be transformed into any kind of shape through processor heating.Example- polythene and PVC.
Thermosetting Plastic: Plastics that are difficult to get transferred into different kinds of shapes through the process of heating are known as Thermosetting plastic. Example- Bakelite and melamine are examples.
4. How to download the CBSE Class 8 Science Synthetic Fibres and Plastics Worksheets?
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