Rahul told his mother that he can bring back the shine of their silver cutlery using a piece of aluminium foil, warm water, salt, and baking soda. How does he do that? Explain.
Have you ever wondered why a particular material is chosen for making a particular item? For example, why are vessels used for cooking and heating food made of metals? Why are cooking vessels provided with wooden handles? Why is it advised to wear gloves while removing baking dish from the oven? Could a baking dish be made of simple glass?
Water from different places produces varying amounts of lather when soap or detergent are added to them. What could be the reason? Do the metallic substances present in water play any role in this?
