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This are metals that don´t cotin iron, and we can find them directly from nature. The most useful ones are: copper, tin, aluminium and zinc.

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This are metals contain iron and we cannot find them pure from nature. They can be classified as: iron, steel and cast iron.

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We usually obtain it from leftover wood. The most common ones are paper, cardboard and cork.

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It´s similar to natural wood but humans have modify it to made it cheaper. The  most important types of man-made wood are plywood and chipboard.

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1. Tensile strength:  resistance to stretching.
2. Compressive strength: resistance to being crushed.
3. Flexural strength: resistane to bending.
4. Hardness: resistance to being scratched.
5. Toughness: resistance of not being broken.
6. Thermal and electrical conductivity.
7. Sound conductivity.
8. Colour.
9. Density.

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Is the ability of a material to be pressed or rolled.

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Is the ability of a material to stretched into a wire

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This is the ability of a material to be deformed.

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This is the resistence of a material that is not easy to break.

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This is the resistance of a material to being scratched or pierced.

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Processed materials are manufactured raw materials.

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Natural materials are prepare or refine raw materials.

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1.Natural and processed materials. Common materials

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1.Natural and processed materials. Common materials

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Raw materials are materials taken directly from nature.