Example: I would make a plastic screwdriver. Electricians could use the screwdriver because it does not conduct electricity. However, the screwdriver would still be strong. Optional Discussion: Explain your troubles if suddenly all plastics or rubber were removed from your daily life. Explain how life would be different and what kinds of challenges you might face or what kinds of improvements might be made to your life.
Assessment: Ask the listed questions to determine the students' understanding of the physical properties of plastics or rubber. Monitor the student responses for completeness and accurate ideas. The questions have been left open to allow for student creativity and to encourage the students to justify their thinking.
Students should have previously discussed the idea of an observation being made using the senses. Observations include measurements. Students should have previously discussed the idea of an inference being like a guess or a judgment made based upon an observation.
Students should be familiar with how to identify physical properties of an object. Physical properties are the way an object looks, its size, mass, shape, color, etc. Plastics are used in a multitude of products. Water bottles, couches, clothing, and food packages are just a few examples. Plastic can be flexible or rigid or transparent or opaque.
There are more than 10, different kinds of plastics. Plastics are everywhere and can be recycled. Classification: To classify is to place objects into groups based upon similarities. People use classification to order and simplify their daily lives. Books are classified in the library using the Dewey Decimal system. Stores classify movies based upon genre and then alphabetically.
Scientists use classification to study everything from stars to living things. Classification also allows for efficient communication between people. Physical Properties: Physical properties are the way an object looks, its size, mass, shape, color, etc. During the lesson, students should be making metric measurements regarding the objects mass and size.
Students categorize and classify objects on a daily basis. Furthermore, their lives are simplified by the classification and organization already present. Plastics and rubber are also items that students use on a daily basis possibly without realizing what the material is that they are using. You have just opened your "junk drawer" at home to find a wide array of objects.
To help you find the objects in the future, classify the objects by placing them into three different categories. The first category will be rubber. There are a large number of products that can be acquired from rubber. Some examples are rubber shoes, tires of various vehicles, waterproof garments, balloons, protecting gloves, and plenty of alternative things. A polymer, Plastic is a material that has the flexibility to be shaped and formed by the appliance of warmth and pressure, known as its physical property.
The plasticity of plastic permits it to be developed into totally different shapes. In Spite of these features , the lightweight becomes an additional great reason for it to be employed in the production of various instrumentation.
Also, it contains low levels of denseness, allows electric currents, transparency, toughness and are durable with low levels of degradation. There are large kinds of plastic polymers which are usually classified with regard to totally different parameters.
Such as chemical and physical properties, their chemical structure, technique of synthesis, etc. Few industrial necessary plastics incorporate polyethylene, polypropylene, PET, etc. Within the production procedure of those plastics, various chemicals are added to them. Some of these chemical compounds that are added are stabilizers to provide long period , fillers to enhance the performance and many more.
They are synthetic or artificial in nature. Also, they are high in molecular mass, which makes them moldable when soft, and are widely used in the manufacture of many materials such as coatings, artificial fibers, etc. Rubber, on the other hand, is defined as an organic material which is derived from the sap of the rubber trees. The sap or the latex from the trees is coagulated and dried to make rubber.
It is elastic in nature and is classified as Elastomers. Also, it has a high stretch ratio, high resistance to breakage and water. Both plastic and rubber are made up of polymers. Plastic contains polymers such as plasticizer, stabilizer, filler, pigments, etc, whereas rubber contains iso-propene, other organic compounds, and water. The main difference is based on their material, by looking and touching, one can easily distinguish from plastic and rubber.
Also, based on their properties, both can be classified easily, there are more than types of plastic, but the two main types are thermosetting and thermoplastic. On the other hand, there are only two types of rubber, organic and synthetic. Another difference between plastic and rubber is in their specific properties of durability, elasticity, plasticity, etc, which are differentiated in the table below.
The key difference between Rubber and Plastics is that the Rubber is a polymerized product of isoprene whereas Plastic is made of many synthetic and semi-synthetic organic polymer compounds.
Many varieties of products are manufactured using rubber and plastic depending on their characteristic nature. Rubber is a natural product, mainly harvested in the form of latex obtained from the rubber tree, Hevea brasiliensis which is indigenous to South America. However, at present, many varieties of rubber trees are used to harvest latex, and South Asia is considered a main producer.
After this, the collected latex is sent for commercial processing. Here, the rubber is processed into high-grade block rubber or sheet-grade rubber. This was introduced by Charles Goodyear in
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