CBSE Class 8 Chapter - Minerals and Power Resources Revision Notes Minerals are naturally occurring substances that have a definite chemical composition. Minerals are formed in different types of geological environments, under varying conditions. Minerals can be identified on the basis of their physical properties such as colour, density, hardness and chemical property such as solubility. Minerals are distributed in rocks and sea bed also. Tropical regions are very rich in terms of mineral resources. Types of Minerals: i. On the basis of composition, minerals are classified into metallic and non-metallic types. ii. Metallic, minerals contain metals in raw form. iii. Metals are hard substances that conduct heat and electricity and have lustre or shine. For example, iron ore and bauxite. iv. Metallic minerals are...