Science 4 Unit 11 materials

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  • Unit 11 materials

  • 11.1 properties of materials
  • Material are used to make objects.
  • Properties are the characteristics of materials.
  • Materials properties include hardness, flexibility, ductile, buoyancy, strength, and resistance.

  • Hardness: the material ability to withstand wear and scratches.
  • a.     Hard material
  • Materials:  diamond, glass, ceramic, aluminum
  • Object: glass cutter, window pane, tea pot, drink can
  • b.    Soft material
  • Materials: rubber, fabric
  • Object: erases, cloth
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  • Flexibility: the material ability to bend without breaking.
  • a.     Flexible material
  • Materials: plastic, rubber,
  • Object: plastic ruler, water hose
  • b.    Rigid material
  • Materials: glass,
  • Object: plate
  •  
  • Ductile: the material ability to be pulled into wire
  • a.     Ductile material
  • Materials: copper, gold, iron, aluminum
  • Object: coper wire
  • b.    Non-ductile material
  • Materials: glass, wood
  • Object: piece of glass, wooden log.

  • Buoyancy: the material ability to float in a liquid or a gas
  • a.     Buoyant in water
  • Materials: plastic, wood
  • Object: plastic bottle, wooden boat
  • b.    Non-buoyant in water
  • Materials: metal, glass, ceramics
  • Object: metal coins, anchor

  • Strength: the material ability to withstand heavy load without breaking or tearing.
  • a.     Strong material
  • Materials: alloys, wood
  • Object: bridge, dam
  •  
  • b.    Weak material
  • Materials: paper
  • Object: piece of paper, paper bag
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  • Resistance to water: the material ability to withstand wear and scratches.
  • a.     water proof material
  • Materials: plastic, glass, rubber, nylon
  • Object: fishbowls, raincoats
  • b.    non-waterproof material
  • Materials: paper, cotton
  • Object: piece of paper, cloth.
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  • 11.2 relating properties of materials to not allowing water to pass through it.


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