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5th Class Science Matter and Materials Question Bank Matter

  • question_answer
    Vijay performed an experiment to compare the heat conductivity of four different materials P, Q, R and S. Thumbtacks were fixed with wax on each material and then the materials were fixed to a trough containing hot water as shown in the diagram.
     
    Vijay tabulated his results as shown here. 
     
    Material Time taken for thumbtacks to drop (minutes)
    P 5
    Q 6
    R 2
    S 4
    What can be inferred from his experiment?

    A) Material R is a better conductor of heat than material S.

    B) Material S is a better conductor of heat than material R.

    C) Material Q is a better conductor of heat than material P.

    D) Materials P, Q, R and S are equally good conductors of heat.

    Correct Answer: A

    Solution :

    Material R is better conductor of heat because it took only 2 minutes for the wax attached to it to melt as compared to material S which took 4 minutes.


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