7th Geography Ncert Chapter 2

Important Topics from the Chapter: Inside Our Earth

1. Interior of the Earth:

– The Earth is made up of several layers – crust, mantle, and core, each with distinct characteristics and compositions. The continental crust is different from the oceanic crust based on mineral constituents7.

2. Rocks and Minerals:

– Rocks are natural masses of mineral matter found in the Earth's crust, categorized into igneous, sedimentary, and metamorphic rocks. The process of rock formation and transformation occurs through cooling, pressure, and heat changes within the Earth's crust7.

3. Rock Cycle:

– The rock cycle describes the continuous process of transformation of rocks from one type to another due to various geological forces such as cooling, erosion, and pressure. It includes the formation of igneous, sedimentary, and metamorphic rocks in a cyclic manner7.

4. Minerals:

– Minerals are naturally occurring substances with specific physical properties and defined chemical compositions. They play crucial roles in various applications like fuel (coal, petroleum), industry (iron, aluminum), medicine, and agriculture7.

5. Uses of Rocks:

– Rocks have diverse applications, such as construction of roads, buildings, and artifacts, and are fundamental in various games. Understanding the types and properties of rocks is important for their practical utilization and geological significance7.