4th Class Science Matter and Materials Question Bank Matter and Materials

  • question_answer
    A group of students used a data logger to measure the amount of light passing through three different materials, a, b and c. The results are shown in the graph below.
     
    Based on the graph, which of the following options is correct?
       

    A)

    Statement True False Not possible to tell
    Material a allows no light to pass through it.    
                   

    B)

    Statement True False Not possible to tell
    Material b allows more light to pass through it than material c.    
                   

    C)

    Statement True False Not possible to tell
    Material c could be clear plastic sheet.    
                   

    D)

    Statement True False Not possible to tell
    Shadow is formed by material a.      

    Correct Answer: B

    Solution :

    Material b allows maximum light to pass through it, hence it could be a transparent material. Material a does not allow any light to pass through it, hence, it is an opaque material and opaque material cast shadow when light shone on them. Material c allows some but not all light to pass through it hence it could be any translucent object.

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