Separation of Substances in Daily Life
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Questions and Answers

What is the primary purpose of threshing in the process of separating grain seeds from their stalks?

  • To water the stalks
  • To bundle the stalks after harvesting
  • To dry the stalks in the sun
  • To free the grain seeds from the stalks (correct)
  • What is the main difference between the sizes of particles of the two components in the grain mixture?

  • The sizes of particles are different (correct)
  • The sizes of particles are similar
  • The sizes of particles are irrelevant
  • The sizes of particles are unknown
  • What is the most suitable method to separate the components of the grain mixture based on the given information?

  • Filtration
  • Handpicking (correct)
  • Decantation
  • Threshing
  • What is the name of the process used to separate grain seeds from their stalks in the field?

    <p>Threshing</p> Signup and view all the answers

    Why is it impossible to pluck grain seeds from their stalks?

    <p>Because the grain seeds are too small</p> Signup and view all the answers

    What is the purpose of spreading the grains on a sheet of paper in the handpicking activity?

    <p>To observe the grains closely</p> Signup and view all the answers

    What is the main difference between separating grain seeds from stalks and plucking mangoes from trees?

    <p>The size of the particles is different</p> Signup and view all the answers

    What is the process of separating grain seeds from stalks called when it is done on a large scale?

    <p>Threshing</p> Signup and view all the answers

    What is the result of threshing the stalks in the field?

    <p>The grain seeds are separated from the stalks</p> Signup and view all the answers

    What is the primary component of the grain mixture that is spread on a sheet of paper?

    <p>Grain seeds</p> Signup and view all the answers

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