Class 7 Science World of Metals and Non Metals | Class 7 science curiosity chapter 4

World of metals and non-metals is an important chapter for class 7 science or grade 7 science. 

 Topics covered - 

1. Properties of Materials 

Lustre / Appearance, Hardness,  Malleability, Ductility, Sonority, Conduction of heat, Conduction of electricity 

 2. Metals and Non-metals 

3. Effect of Air and Water on Metals 

4. Importance of Non-metals