The study of the nature of materials is of great interest to engineering, metallurgy, physics and chemistry, as well as their neighboring fields, such as architecture and construction. Among the outstanding properties of the materials are: hardness, brittleness, flexibility, impermeability, transparency, and thermal and heat conduction.
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What are the characteristics of materials?
- Quora What are the characteristics of materials? Mechanical properties like hardness, strength, brittleness or ductility etc. Optical properties like transparent, opaque, translucent etc. I have answered in general terms as I am not clear the purpose of your question.
What makes a material suitable for its purpose?
Objectively any material must be suitable for the purpose it was designed for. For example, the wood a dining room table is made from must be strong enough to hold all the dishes, cutlery and elbows placed on it.
What are the characteristics of metals?
They are characterized by bright luster, hardness, ability to resonate sound and are excellent conductors of heat and electricity. Metals are solids under normal conditions except for Mercury.
What are the different types of materials?
There are many different types of materials. Some examples of everyday materials are plastics, metals, fabric and glass. products in the article Plastics and recycling. Find out more about metals and what happens when they mix in the article Metals, alloys and metal compounds.
What are the characteristic of learning materials?
Characteristics of Good TLM The TLMs should be appealing to the kids. Size, shading (multicolour or splendid or engaging shading blend), development (like moving toys) and in a few cases the smell or/and taste or sound are a portion of the properties of the materials which allure students.
What is a course material?
Course Materials are defined as materials that include textbooks and such other materials used for instruction in a course. This includes, but is not limited to e-Books, online resources such as “Inclusive Access,” digital media, computer software, lab kits, and/or classroom supplies.
How do you describe learning materials?
Learning materials refers to one of four elements of integral self-evaluations — in addition to neuroticism, self-efficacy, and self-esteem. It can also predict several professional outcomes including job performance and job satisfaction with a high degree of accuracy.
What are materials in teaching?
Teaching Materials means materials used by an instructor, such as class notes, examination, educational software, books, articles, laboratory manuals, books, works of visual or graphic arts or other teaching aids for the purpose of explaining concepts to students or evaluating their performance.
What are the types of learning materials?
Types of instructional materialsPrintTextbooks, pamphlets, handouts, study guides, manualsAudioCassettes, microphone, podcastVisualCharts, real objects, photographs, transparenciesAudiovisualSlides, tapes, films, filmstrips, television, video, multimediaElectronic InteractiveComputers, graphing calculators, tablets
What is content material?
Content Material means all written copy, illustrations, diagrams, photographs or other materials provided to you as part of the Content Services.
Why are learning materials important?
The purpose and importance of teaching and learning materials is to make lessons interesting, learning easy and enable teachers to easily express concepts. Learning materials can significantly increase learners' achievement by supporting learning.
What do you mean by teaching/learning material explain the importance of teaching/learning material?
Teaching-Learning Materials (TLMs) are important for the teachers in teaching his/her lesson effectively as it help him/her to a better interpretation and appreciation of the concepts, contents as well as the subject matter. TLMS also enables the students to proceeds towards concrete learning.
What is material in lesson plan?
Instructional materials are the content or information conveyed within a course. These include the lectures, readings, textbooks, multimedia components, and other resources in a course.
How do you prepare teaching/learning materials?
Teaching Learning materials should encourage contacts between students and faculty, develop reciprocity & cooperation, and encourage active learning, prompt feedback, emphasize time on task, communicate high expectation and should respect diversity of talent and learning in students.
How do you develop teaching/learning materials?
1 Establish an objective. Establish an objective. ... 2 Analyze the audience. Analyze the audience. ... 3 Consider differing learning styles. Consider differing learning styles. ... 4 Select a delivery method. Select a delivery method. ... 5 Seek ways to integrate technology. Seek ways to integrate technology.
What do you know about teaching learning materials describe in short?
Teaching-learning material (TLM) stands for instructional material. It is any material used by the teacher to enhance their teaching to be more comprehensive and effective in the classroom. also be animate and inanimate. Teaching-learning material can be easily bought or made by the teacher or student.
What are physical properties?
Physical properties refer to properties that can be observed or measured without changing the composition of the material. Examples include colour, hardness and smell and freezing, melting and boiling points. Chemical properties are discovered by observing chemical reactions.
What is matter in science?
Matter is anything that has mass and occupies space. A useful way to start thinking about matter is to think about the different materials, or substances, that it can be made into.
How tightly is matter compacted?
Density is commonly measured in grams per millilitre ( g/ml) or cubic centimetre (g/cm 3 ).
What is ceramic used for?
Ceramic materials are used to make traditional pottery, right through to advanced ceramics used in engineering and medicine. These inventions require scientists to understand the properties of minerals.
How does mixing change materials?
Processes such as mixing, heating and cooling can change materials and their properties. This can be useful as the new properties may be better suited for particular purposes. For example, mixing certain metals can create a material that is both strong and lightweight.
What is the transfer of energy in materials from the random movement of the particles in that material?
Heat energy (heat): Heat energy: the transfer of energy in materials from the random movement of the particles in that material. The greater the random movement of particles the more heat energy the material has. Temperature is a measure of the heat energy of a material.
What is a good conductor of heat and electricity?
metal: Any of a category of elements that usually have a shiny surface, are generally good conductors of heat and electricity and can be melted or fused, hammered into thin sheets or drawn into wires (for example, copper).
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What is material characterization?
Committee on Characterization of Materials, Materials Advisory Board, National Research Council developed the definition of Material Characterization: “ Characterization describes those features of composition and structure (including defects) of a material that are significant for a particular preparation, study of properties, or use, and suffice for reproduction of the material ” . Materials Characterization has 2 main aspects: - Accurately measuring the physical and chemical properties of materials - Accurately measuring (determining) the structure of a material (Atomic level structure & Microscopic level structures) Mechanical, electrical and magnetic properties of a material are strongly dependent on its structural characteristics. Therefore, material characterization is very important part of any structure-property correlation exercise. 6
What is crystallography?
7. Crystallography gives a concise representation of a large assemblage of species by describing and characterizing the structure of crystals. It gives the ‘first view’ towards understanding of the properties of the crystal. CRYSTAL A 3D translationally periodic arrangement of atoms in a space is called a crystal. LATTICE A 3D translationally periodic arrangement of points in a space is called a crystal. Crystal = lattice + motif MOTIF/BASIS An atom or a group of atoms associated with each lattice point . Lattice the underlying periodicity of the crystal Basis Entity associated with each lattice points 7
How are images formed?
33 Three basic ways by which image can be formed: Projection image- formation of a shadows when an object is placed in front of a point source of illumination. Optical image- formed by conventional lens systems. Scanning image- each point of the picture is presented serially (e.g.- television picture). Magnification: Image size/Object size The fineness of detail that can be distinguished in an image. The smallest distance between two points that we can resolve with our eyes is about 0.1- 0.2 mm → Resolution/Resolving power of human eye Any instrument that can show us pictures revealing detail finer than 0.1 mm could be described as a microscope Shorter wavelength greater resolution
What are the quality parameters of an image?
The direct light reaches the objective Diffraction, refraction and absorption of light forms the microscopic image Brightness, resolution, contrast and depth of field are the quality-parameters of the image Surfaces of the sample that are perpendicular to the incident light appear bright Surfaces oblique to the incident light reflect less light back into the objective and appear darker The natural colors of materials can also be observed in this mode Bright field -1 0 +1 The 1st, 2nd ... order are produced by diffraction. Together with the direct 0th order light they form the microscopic image. 65
What are the physical properties of materials?
Materials can be characterized in terms of. State of matter: solid, liquid, gas, plasma etc. Physical properties like density, melting point etc. Mechanical properties like hardness, strength, brittleness or ductility etc. Electrical properties like conductivity. Magnetic properties like ferro, para, and dia magnetism.
What are mechanical properties?
Mechanical properties like hardness, strength, brittleness or ductility etc.
What are the properties of plastic?
Plastic has a number of properties that make it a highly useful material. It is transparent, flexible, resistant to water and electricity. It is also generally lightweight and strong and can be moulded into any shape of all sizes. Plastic can mimic fibres from the natural world such as cotton, silk, wool, porcelain and marble, and successfully make synthetic materials such as clear sheets and flexible films. Plastics are also resistant to chemicals. As many aggressive solvents do not corrode plastic, it is an excellent material for packaging. Plastic is also both a thermal and electrical insulator, meaning that it doesn’t transfer heat or electricity. Subsequently, it is frequently used to manufacture kitchenware.
Which metals have the quality of reflecting light from its surface and can be polished?
Luster: Metals have the quality of reflecting light from its surface and can be polished e.g., gold, silver and copper.
Which metals are hard?
Hardness: All metals are hard except sodium and potassium, which are soft and can be cut with a knife.
Is plastic a strong material?
It is also generally lightweight and strong and can be moulded into any shape of all sizes. Plastic can mimic fibres from the natural world such as cotton, silk, wool, porcelain and marble, and successfully make synthetic materials such as clear sheets and flexible films. Plastics are also resistant to chemicals.
Is plastic a thermal or electrical insulator?
Plastic is also both a thermal and electrical insul. Continue Reading. Plastic has a number of properties that make it a highly useful material. It is transparent, flexible, resistant to water and electricity. It is also generally lightweight and strong and can be moulded into any shape of all sizes.
According to Its Origin
- A first classification of the various existing materials is set at their origin: 1. Natural materials. Coming from animal, plant or mineral nature 2. Artificial or synthetic materials. Coming from laboratories and that do not exist spontaneously. For example, wood , copper , wool, and c…
According to Its Hardness
- Hardness is a property that has to do with the resistance of matter to deformationor breakage when subjected to a continuous force. In this sense, we can speak of softer materials (they yield to the forces that deform them) and harder(they resist them). For example, the steel , diamond and cementare hard materials; plastic, wood, and rubber are soft materials.
According to Its Flexibility
- Flexibility is the ability of materials to alter their shape without breaking, once subjected to a continuous and stable force . According to its flexibility we can speak of three types of materials: flexible, rigid and elastic. 1. Flexible materials. They are easily deformable by applying a force. For example: plasticine or flexible dough used in crafts. 2. Rigid or brittle materials. They …
According to Its Malleability
- Malleability is the ability of certain hard materials to be deformed and molded without breaking, applying compression through force. This allows the separation of its particles into more or less thin sheets. This property applies above all to metals, such as gold , aluminum , platinum, copper or iron .
According to Its Ductility
- Ductility is similar to malleability, since ductile materials deform under the application of force without breaking, but instead of producing sheets, yarns or wires are obtained from them. Non-ductile materials, on the other hand, are considered brittle, since they break. Examples of ductile materials are: platinum, copper, zinc , lead, and plastic.
According to Its Transparency
- Transparent materials are those that allow light to pass through their bodies, making it possible to see what is behind them. This property allows us to discern between materials: 1. Transparent. They let the light pass . For example: polished glass or cellophane. 2. Opaque. They do not let the light pass. For example: wood, cardboard or plastic. 3. Translucent. They allow lig…
According to Its Conductivity
- Conductivity is the ability to allow the transit of energy through their bodies, either heat energy (thermal conductivity) or electrical energy (electrical conductivity) or both. Materials that are not conductive, on the other hand, are called insulators. 1. Thermal conductivity. This physical property of materials consists of the ability to transfer kinetic energy between the particles of on…
New Materials
- It is known as “new materials” to the forms of matter produced by humanity in laboratories, applying contemporary technology and scientific knowledge, in the production of substances that do not exist in nature and endowed with surprising physical-chemical properties. Examples of this are airbrush, the lightest substance available; upsalita, the most powerful desiccant ever invente…
Types of Materials
- There are many different types of materials. Some examples of everyday materials are plastics, metals, fabric and glass. Find out more about plastic3 products in the article Plastics and recycling. Find out more about metals and what happens when they mix in the article Metals, alloys and metal compounds. Ceramic4 materials are used to make traditional pottery, right thro…
Examples of Properties
- When we refer to the properties of a material, we are talking about features we can sense, measure or test. For example, if we have a sample of metal6 in front of us, we can identify that this material is grey, hard and shiny. Testing shows that this material is able to conduct heat7 and electricity8 and that it will react with an acid9. These are ...
Physical Versus Chemical
- Sometimes it can be useful to distinguish between different types of properties. Physical properties refer to properties that can be observed or measured without changing the composition of the material. Examples include colour, hardness and smell and freezing, melting and boiling points. Chemical properties are discovered by observing chemical reactions. They in…
Changing Material Properties
- Processes such as mixing, heating and cooling can change materials and their properties. This can be useful as the new properties may be better suited for particular purposes. For example, mixing certain metals can create a material that is both strong and lightweight.
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