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Materials, New and Old

Materials, New and Old

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Materials, New and Old

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  1. Materials, New and Old

  2. Where do the materials we use come from? Can you guess? Hint: There are three types.

  3. Natural Materials

  4. Examples of Natural Materials • Stone (granite, flint, soapstone, etc.) • Wood and plant fibers • Animal parts (antlers, fur, bones, etc.) • Metal (naturally occurring copper, gold, silver, etc.) • Composites (clay, porcelain, soil, etc.)

  5. Processed Materials

  6. Examples of Processed Materials • Metals from ore, such as iron • Alloys, such as bronze • Hides tanned into leather • Sand used to make glass • Mud combined with straw to make adobe bricks • Clay fired into pottery

  7. Human-Made Materials Various plastic products, toys, cups, etc.

  8. Examples of Plastics PET or PETE (polyethylene terephthalate): Found In Soft drink, water bottles

  9. More Plastic Materials HDPE (high density polyethylene): Found in milk jugs, water bottles, some trash and shopping bags, butter and yogurt tubs, and cereal box liners.

  10. More Plastic Materials PVC Polyvinyl chloride,Found In: Window cleaner and detergent bottles, clear food packaging, siding, windows, piping.

  11. More Plastic Materials Nylon: Found in clothing, athletic equipment, carpet, and rugs.

  12. Recycling Human-made materials • Some plastics are difficult to recycle • Because they are new to nature, they may take a long time to decompose • Increasing use of plastics makes disposal a problem