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A renewable resource is one that can be used repeatedly and does not run out because it is naturally replaced. Examples of renewable resources include solar, wind, hydro etc…

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Biodegradeable material generally includes wood, wool, cotton, animal waste or any other organic material which can be broken down into carbondioxide, methane or any other simple organic molecules with the help of micro-organisms. Example: Wood, Cotton, Wool etc…

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Toxic materials are substances that may cause harm to an individual if it enters the body Example: bleach, deodorant etc

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Recycling is the process of collecting and processing materials that would otherwise be thrown away as trash and turning them into new products. For example: The paper, The clothes etc…

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By thermal properties of material, we mean those properties or characteristics of materials which are the functions of temperature or heat.

thermic conductivity, fusibility, weldability, expansion

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Optical materials are substances used to manipulate the flow of light. This can include reflecting, absorbing, focusing or splitting an optical beam.

opaque, transparent, semitransparent

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The mechanical properties of a material reflect the relationship between its response or deformation to an applied load or force. Important mechanical properties are strength, hardness, ductility and stiffness.

elasticity, plasticity, malleability, ductility, hardness, tenacity

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Electrical energy is the power an atom's charged particles have to cause an action or move an object.

conductor

non conductor

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Transform a body or a compound by the action of oxygen or another oxidant; in particular, cause an oxide layer to form on iron or other metal by this action