Verdadero: Raw materials are also called Natural materials, Raw also means food that have not been cooked yet, Raw materials can be: animal, vegetable or mineral, chemical properties is one of the properties of materials, A material is though is its hard to break, thermical conductivity is a physical properties, recycable. materials that can be reused, Falso: Artificial materials are also called Hand-made materials, Artificial materials are those that are in its natural state, Paper is a raw material made from wood, hardness is a ecological properties, Opaque: all light can travel through it, oxidation only occurs when a metal is in contact with water, biodegradable : materials which are harmful to the enviroment,

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