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Materials' properties, Material Changes, Changes ...

  • Wood that is burning is .... (physical change/ chemical change)
    chemical change
  •  15
  • Is this an example of a physical or chemical change?
    physical change
  •  15
  • Observe the pictures! Rusted iron is chemical change because ....
    •The colour , odour , shape or structure of the original materials change. •The new materials formed cannot be changed back to their original forms.
  •  20
  • Physical or Chemical Change? Cutting an orange into wedges.
    physical change
  •  15
  • Which trash bin where we throw the leftover foods?
    organic (recyclable waste)
  •  15
  • Observe the pictures! What are the properties of the object in the picture? (Mention 2!)
    strong, rigid, fixed, electric isolator, heat isolator
  •  20
  • Mention one object that has properties: non-magnetic, hard, rigid, transparent.
    window, glass, bowl, etc
  •  15
  • Mention two correct and safe ways to handle materials and household items!
    labelling them properly. using them for their intended purpose. keeping them in suitable places. disposing used materials properly .
  •  20
  • When ice gains heat, it changes to ....
    liquid
  •  15
  • What is the boiling point of water?
    100 degree Celcius (100°C)
  •  15
  • Water begins to freeze at ....
    0°C (zero degree Celcius)
  •  15
  • When gases lose heat they will condense into ....
    liquids
  •  15
  • What is evaporation?
    When water turns into a vapor (water -> gas)
  •  15
  • What is happening when my ice cream changes from a solid to a liquid?
    melting
  •  15
  • Which change of state that gains heat?
    A and B
  •  20
  • Observe the pictures! What are the properties of the object in the picture? (Mention 2!)
    flexible, soft, heat isolator, electric isolator
  •  20