CBSE  /  Class 6  /  Science  /  Changes Around Us

  • 1. 
    Which of the following changes can be reversed?

  • Raw egg to boiled egg
  • Wet clothes to dry clothes
  • Bud to flower
  • Cow dung to biogas

  • 2. 
    Which of the following changes cannot be reversed?

  • Milk to paneer
  • Cold milk to hot milk
  • Yam to knitted sweater
  • Wet clothes to dry clothes

  • 3. 
    Metal rim is fixed to the wooden cart wheel by

  • heating metal rim
  • heating wooden wheel
  • cooling metal rim
  • cooling wooden wheel

  • 4. 
    On heating metal rim

  • expands
  • contracts
  • depends how much it is heated
  • depends as the type of meted

  • 5. 
    Which one of the steps while burning a candle is not reversible?

  • Melting of solid wax
  • liquid wax changes into vapours
  • Wax vapour bums into flame
  • All of these

  • 6. 
    Which is a way to make a change happen?

  • Heating a substance
  • Cooling a substance
  • Mixing a substance with another substance
  • All of these

  • 7. 
    Rusting of iron is an example of

  • slow change
  • fast change
  • reversible change
  • physical change

  • 8. 
    Conversion of a solid to liquid by heating is called

  • evaporation
  • melting
  • condensation
  • freezing

  • 9. 
    Which of the following is not a man-made change?

  • Change of day and night
  • Burning of fuels
  • Drying of clothes
  • Tearing of paper

  • 10. 
    Which of the following is a chemical change?

  • Evaporation of water
  • Burning of fuels
  • Moving of a wheel
  • Breaking of a brick
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