Page 2 - CBW
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6.     Assertion (A): Metals are usually good conductors of electricity.
                    Reason (R): Metals allow electricity to pass through them.
             7.     Assertion (A): Sugar dissolves in water.
                    Reason (R): Sugar is a soluble substance.
             8.     State whether the statement is true or false:
                       a)  Materials that float on water are always less dense than water.
                       b)  Rubber is a good conductor of electricity.

             9.     A construction company is choosing materials for a building project. They are considering
                    glass, plastic, and wood for use in windows. The company needs materials that allow light to
                    pass through. The project manager conducts tests to check the transparency of each
                    material.
                    Based on the case study, answer the following questions:
                       a)  Which material is most suitable for making windows and why?
                       b)  What property of glass is being tested in this scenario?
                       c)  Can plastic be used as an alternative to glass for windows? Justify your answer.
             10.    You are tasked with organizing books in a library. The library has thousands of books that cover
                    a wide range of topics, including fiction, history, science, and self-help. The current system uses
                    a random arrangement, making it difficult for library users to find what they need.
                    Based on the case study, answer the following questions
                       a)  How would you sort the books into groups?
                       b)  What factors would you consider to make the system efficient and easy for library users
                           to navigate?
                       c)  Provide examples of groups you would create and justify your choices.

             11.    a) Name two gases that are soluble in water.
                    b) State if they are elements or compounds.
             12.    There are thousands of items in a grocery shop. Yet the
                    shopkeepers deliver the items so quickly.


                    What do you think makes the work easier for them?







             13.    Fill in the blanks:
                       a)  The property of a material that allows it to float on water is related to its __________.
                       b)  __________ is a property that allows a material to be stretched into thin wires.
             14.    How does sorting materials help in waste management and recycling?

             15.    A steel tumbler and a plastic cup are used to serve hot tea. Which one would you recommend
                    and why?
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