NCERT Solutions for Class 8 Science Chapter 3: Synthetic Fibres and Plastic
Science is an exciting subject, and it plays a vital role in a student’s life as it offers various concepts that can appear in the following classes. Class 8 also holds equal importance for the students as it prepares them for their future career options in Science and Engineering. Hence it is a transition phase for any student who wishes to take Science as a significant subject.
Class 8 Science Chapter 3 is about synthetic fibers and plastic. First, it introduces the various types of synthetic fibers and their characteristics. Here, students learn about fiber, polymer, natural fiber, silk, and nylon. In addition, they will understand how thermoplastic is formed and its characteristics. Furthermore, students can understand the key difference between biodegradable and non-biodegradable materials.
Students can benefit from our website and access NCERT solutions for Class 8 Science Chapter 3. Our solutions help the students to get detailed notes, illustrations, and examples, and it also has previous years’ papers. The students will be able to gain confidence in the Science subject with the help of the solutions.
Extramarks is a leading online learning platform that provides students with the best study material and solutions. The solution tries to build the skills which are essential for enhanced learning. It helps to build a foundation on all the concepts prescribed in the NCERT curriculum and CBSE Class 8 Science.
Our NCERT solution guide covers important subtopics such as the uses of synthetic fibers, different types of synthetic fibers, characteristics of plastics, and the effect of plastics on the environment. It also elaborates on the role and contribution of other synthetic fibers such as Rayon, Nylon, Polyester, and acrylic.
Students can visit the Extramarks website for current updates and notifications about the NCERT syllabus and its exam-related updates. Further, students can access other class solutions, including NCERT solutions Class 9, NCERT solutions Class 10, and NCERT solutions Class 11.
Key Topics Covered In NCERT Solutions for Class 8 Science Chapter 3
Class 8 Science Chapter 3 solutions maintain quality by following the guidelines and syllabus for Class 8. Our NCERT solutions are easy to understand with elaborative illustrations and diagrams so that students rarely face any difficulty in learning the answers. The Science teachers have written NCERT solutions for Class 8 Science Chapter 3 in a very simplistic and easy-to-understand manner to clarify their concepts and help them excel in their academics. .
The sub-topic covered in Extramarks NCERT solutions for Class 8 Science Chapter 3 are given below:
| What are synthetic fibres? |
| Types of synthetic fibres |
| Characteristics of synthetic fibres |
| Plastics |
| Plastic as a material of choice |
| Plastics and Environment |
What are synthetic fibers?
Synthetic fiber is an artificial fiber that is prepared by using raw materials. The materials predominantly originated from petroleum which is also known as petrochemicals. Besides, there are several processes involved in the preparation of fiber. Some of the standard synthetic fibers are rayon, polyester, and nylon.
The fibers are made up of tiny chemical units known as monomers. They are joined together to form a chain, and these chains are called polymers. Synthetic fibers are also obtained by the chemical processing of petrochemicals, unlike natural fibers made from animal and plant sources. In our Extramarks NCERT solutions for Class 8 Science Chapter 3, we have elaborated on the processing of the petrochemicals in detail.
Types of synthetic fibers
The classification of synthetic fibers is based on the chemicals used in their manufacturing. Therefore, every fiber differs in its nature of burning, affordability, availability, water absorption, etc. The different types of synthetic fibers discussed in NCERT solutions for Class 8 Science Chapter 3 are listed below:
- Rayon: It is artificial silk known as viscose-rayon regenerated cellulose. The cellulose is obtained from the natural source of wood pulp. Besides, it is also manufactured fiber made in the laboratory by chemical treatment of wood pulp. It is dyed in various colors, and it can also be woven like silk fibers. Rayon is used to making fabrics, bedsheets, carpets, and car upholstery.
- Acrylic: It is a monomer also known as polyacrylonitrile. Acrylic fiber is similar to wool used to make sweaters, blankets, shawls, etc. Therefore, it is affordable, cheap, and durable compared to natural woolen fibers. In addition, acrylics are light, soft, warm, and resistant to chemicals, moths, and sunlight.
- Polyester: It is also a monomer ester and manufactured fiber. Polyester offers a brilliant wrinkle-free quality and remains crisp, and it is easy to wash. Therefore, it is used for dresses, suits, rainwear, etc. In addition, a type of polyester known as PET or Polyethylene terephthalate is trendy for making kitchen products, wires, bottles, etc.
- Nylon is different from other fabric types; it is a polymer of adipic acid hexamethylenediamine. Nylon is the first fiber made from coal, water, and air. They are light, elastic, strong, durable, and lustrous. This property makes it a good choice for fabrics, and it also dries up quickly. Nylon is used in car seats, belts, ropes, curtains, and toothbrushes.
To understand the properties of synthetic fibers in detail, students can register on the Extramarks website and access NCERT solutions for Class 8 Science Chapter 3.
Characteristics of synthetic fibers
- Synthetic fibers dry up quickly, are durable, and are less expensive. In addition, it is readily available and easy to maintain.
- Synthetic fibers melt on heating and can catch fire which can be disastrous.
- The fibers are strong, elastic, and light.
Plastics
Many people use plastic in their everyday life. Plastic is also a polymer like synthetic fibers. Further, there are various forms and uses of plastic. It can be recycled, reused, colored, melted or made into wires. The plastic can be deformed easily by heating and made easily known as “Thermoplastic”.
Besides, there are some plastics that, when molded once, cannot be softened by heating, called “Thermosetting” plastic. Bakelite and melamine are two examples of the thermosetting plastic. Whereas bakelite is a poor conductor of heat and electricity, melamine is a versatile material. Students can refer to our NCERT solutions for Class 8 Science Chapter 3, where we have elaborated on the various properties of plastic.
Plastic as a material of choice
Various food items such as water, milk, pickles, and dry food are primarily stored in plastic containers. They are lightweight, strong, durable, have good strength, and are easy to handle. On the other hand, metals like iron rust over time and when exposed to moisture. Yet, it is different from plastic materials. Plastic can easily be molded into various shapes and sizes.
Plastic is a lot cheaper than metals. Further, it is used in many industries such as health care, fire industry, IT industry, and wrapping industry. Plastic has a lot to offer as a material. Therefore, students can register on our Extramarks website or refer to NCERT solutions for Class 8 Science Chapter 3. We have explained the critical role of plastic in different industries in detail.
Plastics and Environment
Plastic as a material is not environmentally friendly as it accumulates in the environment over the years without disintegrating. When we burn plastics, it releases toxic gases into the atmosphere, which pose a health hazard for humans, animals, and plants; further, plastic is not biodegradable. It means that plastic cannot be decomposed naturally by the action of bacteria.
When plastic bags are not disposed of properly, they can clog the drains and can lead to choking on animals. There are five R principles: Reduce, Recycle, Reuse, Recover, and Refuse to keep our environment safe. It can contribute to cleaning our environment. There are also some eco-friendly ways, such as cloth bags, steel utensils, and paper bags.
Students can access NCERT solutions for Class 8 Science Chapter 3 on our website to understand plastic and its impact on nature.
NCERT Solutions for Class 8 Science Chapter 3: Exercises & Solutions
Extramarks NCERT solutions for Class 8 Science Chapter 3 offers students all the solved answers to questions from the textbook chapters. The answers are written in a descriptive and detailed manner, which helps in answering the question and clears all the doubts while responding to similar questions while revising and in exams.
Besides, students can take advantage and start with a trial account by registering on our website. Our NCERT solutions have proven fruitful for many students in primary and secondary classes. The solutions cover all the sub-topics in Chapter 3, synthetic fibers and plastic. All the essential topics are explained in a simple and easy-to-understand language which helps students score well in the Science exams.
Students can click on the link below to access the exercise-specific questions and their solutions which are covered in Extramarks NCERT solutions for Class 8 Science Chapter 3:
- Chapter 3: Exercise 3.1 Solutions: 14 Questions
Our NCERT solutions are also available for other primary and secondary classes on our Extramarks website. Students can click on the links given below:
NCERT Exemplar for Class 8 Science
Science is a subject of curiosity about the nature and behavior of natural things. It demands a high level of understanding to grasp the concepts. To increase the knowledge of such concepts, solving different equations is always beneficial. It helps to clear the doubt and develop a strong understanding of the topics.
NCERT Exemplars are designed in the same manner to help the students to enhance their knowledge of the topic. It has various types of questions with varying levels of difficulty such as multiple-choice questions; fill in the blanks and match the following questions. It also contains objective, concise answer type, short-answer type, and long-answer-type questions in Chapter 3, Class 8. With the daily practice of the exemplar, students can expect good results in the examination. In other words, an effort has been made to ensure that nothing is left in the process.
Our NCERT solutions for Class 8 Science Chapter 3 offer questions from exemplars covering the topics of synthetic fibers and plastic. Here, students will explore different sub-topics, including characteristics of plastics, thermoplastics, thermosetting plastic, and acrylic fiber. In addition, students will understand the critical difference between biodegradable and non-biodegradable materials. It will ensure that even the minutest doubt is resolved and the students develop an interest in learning and mastering the topic with ease.
NCERT Solutions Class 8 Science Chapter-wise List
Key Features of NCERT Solutions for Class 8 Science Chapter 3
Extramarks has an in-house dedicated team of subject experts who prepare accurate, up-to-date, and authentic solutions for each topic and each section covered in the chapter. Some Students find it difficult to answer the textbook questions and they should follow the answers on our Extramarks website to get an overall idea about the chapter to help them achieve excellent scores.
Some of the prominent characteristics of our NCERT solutions for Class 8 Science Chapter 3 are as follows:
- The solutions help clarify students’ queries that arise while learning the chapter.
- The answers are prepared in an understandable language, making it easy for students to learn complicated definitions.
- NCERT Solutions for Class 8 Science Chapter 3 strictly adhere to the CBSE syllabus and guidelines for students to prepare for the exam more rigorously so that they don’t have to look for any help elsewhere.
- The subject experts frame each answer in the solution with utmost care to encourage and enable reading abilities among students to study independently and master the topic with ease.