Question

Chalk, iron nail, wood, aluminum, candle, and cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

Answer 1

These materials can be differentiated on the basis of lustre, hardness, softness, roughness, or smoothness. It is tabulated in the table given below.

Materials	Properties
Chalk	The texture is rough and cannot be compressed
Iron nail	Hard, low density, malleable, high conductivity, and lustrous
Aluminum	Hard, ductile, malleable, and lustrous
Candle	The texture is smooth, and it can be easily compressed.
Cotton	Easily compressible, soft, and non-lustrous
Wood	Incompressible, non-lustrous, and hard