If your child is in Class 8 and studying synthetic fibres and plastics, you may be looking for additional resources to reinforce their learning. This free PDF contains printable worksheets that cover a range of topics related to synthetic fibres and plastics, helping your child develop a strong understanding of these materials.
What are synthetic fibres and plastics?
Synthetic fibres and plastics are man-made materials that are designed to mimic the qualities of natural materials, such as cotton or wood. These materials are produced using chemical processes, which allows manufacturers to customize their properties, making them stronger or more durable than natural fibers. Synthetic fibers and plastics are commonly used in a variety of products like clothing, packaging, and electronics due to their versatility and cost-effectiveness.
Types of synthetic fibers - Nylon, Polyester, Acrylic, Rayon
Synthetic fibers are man-made fibers that are created through chemical processes. These fibers are composed of polymers, which are long chains of molecules that can be spun into fiber form. Nylon, polyester, acrylic, and rayon are some of the most common types of synthetic fibers used in various products. Nylon is known for its strength and durability and is commonly used in outdoor gear like tents and backpacks. Polyester is a versatile fiber that's easy to care for and resists wrinkles, making it popular in clothing production. Acrylic is often used as a substitute for wool in clothing because it has similar heat retention properties but is cheaper to produce. Rayon is another popular option due to its softness and draping quality often used in dresses or home furnishings like curtains or tablecloths.
Advantages and disadvantages of synthetic fibers and plastics.
Understanding the advantages and disadvantages of synthetic fibers and plastics is crucial in determining their appropriate use. The benefits of synthetic fibers include increased durability, a wide range of textures and colors, and resistance to wrinkles, shrinkage, and moth damage. Synthetic fibers are also easier to care for than natural fibers like cotton or wool. However, the disadvantage is that some synthetic fibers are not biodegradable and can harm the environment. In addition, they may cause skin irritations due to their non-breathable nature. As for plastics, they offer an array of benefits such as flexibility, toughness, lightweight features, resistance to water and chemicals, and low production cost. Nonetheless, plastic products have many disadvantages such as pollution which involves all stages from manufacturing down to disposal they also take centuries-long time to decompose which has a negative impact on the environment.
Properties of plastic materials - Durability, flexibility, heat resistance.
Synthetic plastics are known for their unique and useful properties. One of the most significant advantages of plastic materials is their durability, which makes them long-lasting and resistant to wear and tear. This quality also makes them an ideal material for a wide range of products from toys to medical equipment. Another important property is flexibility, allowing plastics to be formed into various shapes without breaking or cracking. Additionally, some types of plastics can withstand high temperatures, which make them suitable for use in industries such as automotive or aerospace manufacturing. Understanding the properties of plastic materials can help individuals make informed decisions about what products they purchase and how they use them.
Uses of synthetic fibers and plastics in day-to-day life
Synthetic fibers and plastics have become an integral part of our daily lives due to their many properties and benefits. Clothing made from synthetic fibers such as polyester, nylon, and acrylic are affordable, durable, and easy to maintain. They also provide warmth, comfort, and are available in a variety of colors and designs. Plastics are used extensively in packaging materials such as bottles, containers, bags to preserve food and other items. Similarly, plastic products like toys, electronic gadgets, furniture, and household appliances make our daily lives more comfortable and convenient. Overall, understanding the uses of synthetic fibers and plastics can help individuals appreciate their significance in modern living while also being aware of their impact on the environment.
Synthetic fibres and plastics are important topics covered in Class 8 Science. To aid in the understanding and learning of these concepts, NCERT worksheets are available for students with answers. These worksheets cover various aspects of synthetic fibres and plastics, including their sources, properties, and uses. Synthetic fibres are also known as man-made or artificial fibres and are made by humans using chemical processes. The strongest synthetic fibre is known as Kevlar, which is used in body armour and bulletproof vests. Rayon is called a regenerated fibre because it is made from natural cellulose, which is then chemically treated to create a fibre.
Synthetic fibres and plastics are similar in that they are both man-made materials, but they have different properties and uses. Synthetic fibres are used in clothing, upholstery, and other textiles, while plastics are used in packaging, electronics, and construction. Synthetic fibres are also called man-made or artificial fibres and are made by humans using chemical processes. Rayon is different from synthetic fibres because it is made from natural cellulose, but it is still considered a man-made fibre because of the chemical process used to create it.
There are various sources of synthetic fibres, including petroleum, coal, and natural gas. Polyester is a commonly used synthetic fibre and is made from petrochemicals. Bakelite, a type of plastic, is made from phenol and formaldehyde and was one of the first plastics invented. Blended fibres are also common, which combine different types of fibres to create a material with unique properties.
In conclusion, synthetic fibres and plastics are important materials used in various industries, and Class 8 students can learn about them through NCERT worksheets. These worksheets cover different aspects of synthetic fibres and plastics, including their sources, properties, and uses. By understanding the differences between natural and synthetic fibres and the properties of these materials, students can gain a deeper appreciation for the materials that surround them in their daily lives.
Synthetic Fibres And Plastics Class 8 Extra Questions And Answers
What are synthetic fibres?
Synthetic fibres are man-made fibres that are produced by chemical processes. They are not found naturally, unlike natural fibres like cotton, wool, silk, etc.
What is the difference between natural and synthetic fibres?
Natural fibres are obtained from plants, animals or minerals and are not chemically modified, whereas synthetic fibres are man-made and are produced by chemical processes.
Name two synthetic fibres.
Nylon and polyester are two examples of synthetic fibres.
What is the strongest synthetic fibre?
The strongest synthetic fibre is carbon fibre.
Why is rayon called a regenerated fibre?
Rayon is called a regenerated fibre because it is made by chemically treating cellulose from wood pulp to create a fibre.
What is the difference between rayon and synthetic fibres?
Rayon is made from natural sources, whereas synthetic fibres are man-made. Rayon is also less strong and less durable than synthetic fibres.
What is the most common source of synthetic fibres?
The most common source of synthetic fibres is petroleum.
What are plastics?
Plastics are a group of synthetic materials that are made from polymers. They can be moulded into different shapes and are used for various purposes.
What is the difference between thermoplastics and thermosetting plastics?
Thermoplastics can be melted and re-moulded into different shapes, whereas thermosetting plastics cannot be melted and re-moulded once they have been shaped and hardened.
Name some common examples of plastics
Some common examples of plastics include polyethylene, polypropylene, polystyrene, PVC, and PET.
Like synthetic fibres, plastic is also a _______.
Like synthetic fibres, plastic is also a polymer.
What is Bakelite?
Bakelite is a type of thermosetting plastic that was commonly used in the past to make electrical switches and handles for various tools and appliances.
What are the advantages of using synthetic fibres and plastics?
Synthetic fibres and plastics are durable, lightweight, and can be made into different shapes and sizes. They are also less expensive than natural fibres and materials, making them more accessible.
What are the disadvantages of using synthetic fibres and plastics?
Synthetic fibres and plastics are non-biodegradable and can take hundreds of years to decompose, leading to environmental pollution. They can also release harmful chemicals during their production and disposal, posing health risks to humans and animals.
What are synthetic fibres?
A: Synthetic fibres are man-made fibres that are produced by combining various chemicals to create a material with specific properties. These fibres are made using various processes like polymerization, melt spinning, and dry spinning.
Q: What is the difference between natural and synthetic fibres?
A: Natural fibres are obtained from plants and animals, while synthetic fibres are man-made. Natural fibres are biodegradable, while synthetic fibres are non-biodegradable. Synthetic fibres are more durable and resistant to wear and tear than natural fibres.
Q: What are the sources of synthetic fibres?
A: Synthetic fibres are made using various chemicals like petroleum, coal, and natural gas as raw materials. Nylon, polyester, and acrylic are some common synthetic fibres.
Q: What is the strongest synthetic fibre?
A: The strongest synthetic fibre is currently considered to be Dyneema or UHMWPE (Ultra-high-molecular-weight polyethylene), which is used in applications such as bulletproof vests and cut-resistant gloves.
Q: What is rayon called a regenerated fibre?
A: Rayon is called a regenerated fibre because it is made from natural cellulose, which is treated with chemicals to produce a fibrous material. This material is then spun into yarn and woven into fabric.
Q: What is the difference between rayon and synthetic fibres?
A: Rayon is made from natural cellulose, while synthetic fibres are man-made. Rayon is biodegradable, while synthetic fibres are not. Synthetic fibres are more durable and resistant to wear and tear than rayon.
Q: What are some examples of synthetic fibres?
A: Some examples of synthetic fibres include nylon, polyester, acrylic, and spandex.
Q: What are plastics? Who discovered plastic.
A: Plastics are synthetic materials made from polymers that can be molded into various shapes and sizes. They are widely used in everyday objects like water bottles, toys, and electronics.
The discovery of plastic is attributed to Alexander Parkes, a British inventor who first demonstrated an early form of plastic called Parkesine in 1856. However, it was not until 1907 that Leo Baekeland, a Belgian-born American chemist, invented Bakelite, the first fully synthetic plastic. Bakelite was a revolutionary material that could be moulded into any shape, was heat-resistant, and did not conduct electricity. It quickly became popular for use in electrical insulators, telephones, and other consumer products.
Q: How are plastics made?
A: Plastics are made from petrochemicals, which are extracted from crude oil or natural gas. These petrochemicals are then processed to form polymers, which can be molded into various shapes and sizes.
Q: How are synthetic fibres and plastics related?
A: Synthetic fibres and plastics are related because they are both made from petrochemicals and are used in a variety of everyday objects. Many synthetic fibres are also used in the production of plastics.
Q: What are some advantages of synthetic fibres and plastics?
A: Synthetic fibres and plastics are durable, lightweight, and easy to clean. They are also resistant to wear and tear, water, and many chemicals.
Q: What are some disadvantages of synthetic fibres and plastics?
A: Synthetic fibres and plastics are non-biodegradable, which means they do not decompose naturally and can cause environmental problems. They are also often made from non-renewable resources and can release harmful chemicals when burned or disposed of improperly.