Sorting Materials into Groups Notes

• Materials can be grouped on the basis of their properties.
• Different types of materials have different properties.
• We have to choose materials with the right properties for what we want to use it for.
• For example, a chalk made of wood or plastic would be of no use because it cannot be used to write on the blackboard.

Natural and Man Made Materials:

• The differences in properties help us in grouping materials into different categories.
• Materials can be grouped on the basis of properties such as roughness, lustre, transparency, solubility, flotation, attraction towards a magnet, conduction of heat, and conduction of electricity.

Appearance/Lustre: