Inside our Earth Class 7 Notes Geography Chapter 2 - PDF Download















FAQs on Inside our Earth Class 7 Notes CBSE Geography Chapter 2 [Free PDF Download]
1. What are the different layers of the Earth’s Interior?
The different layers of the Earth’s interior are known as the Crust, the Mantle, and the Core.
2. What is the radius of the Core of the Earth?
The Core of the Earth has a radius of about 3500 km.
3. What are the different types of rocks found on the earth?
The different types of rocks are Igneous, Metamorphic, and Sedimentary.
4. Explain different types of rocks.
There are three types of rocks. These are igneous rocks, sedimentary rocks and metamorphic rocks. Here are their respective definitions.
Igneous Rocks- These rocks are formed when molten magma comes out after a volcanic eruption. This magma cools down and solidifies thus, forming igneous rocks. They are also known as primary rocks. They are further classified into intrusive and extrusive rocks.
Sedimentary Rocks- Sedimentary rocks are formed by small fragments known as sediments that are transported by water or wind and get deposited on the earth surface. These sediments are hardened and compressed to form sedimentary rocks.
Metamorphic Rocks- They are formed when igneous and sedimentary rocks are exposed to immense heat and pressure. For detailed notes on Chapter 2 Class 7 Geography visit Vedantu. These notes are available at free of cost on the official website of Vedantu and on the Vedantu app.
5. Define intrusive and extrusive rocks.
Intrusive and extrusive rocks are two different types of igneous rocks. Intrusive rocks are formed when molten magma cools and solidifies deep inside the earth. They form huge large sediments or grains as they cool down gradually. Granite is an example of intrusive rocks. On the other hand, extrusive rocks are formed when molten magma comes out of the volcano and cools down in the environment. After cooling, this molten magma converts into extrusive rocks. An example of extrusive rock is basalt.
6. Describe rock cycle
After a volcanic eruption, various components like dust particles, sediments are released into the environment. These components turn into different types of rocks. Igneous rocks are converted into sedimentary rocks. Sedimentary and igneous rocks are further converted into metamorphic rocks under high temperature and pressure. Metamorphic rocks change into sedimentary and igneous rocks due to wearing or melting. This process of conversion of rocks is known as the rock cycle.
7. Write the uses of rocks.
The uses of rocks are:
Hard rocks are used to make supporting structures of buildings, industries, roads, etc.
Rocks like stones, marble, granite, slates are used to make houses and other constructions.
You can use rocks to play different games like hopscotch, seven stone and five stone games.
They are used to create writing materials like chalks.
Cement is created by sedimentary rocks.
Bath scrubs are made from igneous rocks.
Statues, ornaments are built from metamorphic rocks.
8. How to prepare Chapter 2 of Class 7 mentioned in the geography book?
To prepare Chapter 2 Inside Our Earth given in the Class 7 Geography book, follow the listed tips.
Concentrate in the class when your teacher is teaching the chapter.
Revise the concepts of the chapter at your home.
Make notes of the chapter to memorize the concepts. This technique will help you to store things in your mind for a long time.
Practice sample papers of Class 7 Social Science to understand the format of questions asked in the exams.
Explain the concepts to your classmates or friends. This will feed information into your head and will help you to know the areas where you need practice.