Name any two materials from which following things can be made. Write in a tabular form.
Answers
ave you ever wondered why a tumbler is not made with a piece of cloth? Recall our experiments with pieces of cloth in Chapter 3 and also keep in mind that we generally use a tumbler to keep a liquid. Therefore, would it not be silly, if we were to make a tumbler out of cloth (Fig 4.2)! What we need for a tumbler is glass, plastics, metal or other such material that will hold water. Similarly, it would not be wise to use paper-like materials for cooking vessels.
We see then, that we choose a material to make an object depending on its properties, and the purpose for which the object is to be used.
So, what are all the properties of materials that would be important for their usage? Some properties are discussed here.
Appearance
Materials usually look different from each other. Wood looks very different from iron. Iron appears different from copper or aluminium. At the same time, there may be some similarities between iron, copper and aluminium that are not there in wood.