How do we decide which material should be used for making an object?

What material should be used to make the bottle opener ?

how do we see movies

How do we see colours ?

How do we get fits?

What material is used to make handles of utensils ?

How many materials can be used for making chairs ? List them.

How can we classify materials? How?

How can the same material be used ?

A list of things in a house are given in table 2. Name the materials from which each object may possible be made of: (If you don't know which material the objects is made of, discuss with your friends and find out.) How many types of material can be used for making chairs?

Which one of the following materials is used for making shoe polish ?