Useful for CBSE, ICSE, All State Boards
Grade : 5
Subject : Environmental Science
Lesson : Materials Around Us
Topic: Rocks, Minerals and their Uses
A rock is an aggregate of one or more minerals. For example, granite is a rock composed primarily of the minerals quartz, potassium feldspar, and muscovite, a mica mineral. Limestone is a rock whose primary constituent is the mineral calcite. Rocks and the minerals that comprise them form the earth’s crust. There are three types of rocks, classified according to how and where they were formed. These types, described below are igneous, sedimentary and metamorphic.
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