Class 7 Geography Chapter 2 – Inside Our Earth (NCERT / JKBOSE) Question Answers
Inside Our Earth is an important chapter in Class 7 Geography that helps students understand the structure of the Earth, including its layers, composition, and internal processes. This chapter explains concepts such as the crust, mantle, core, earthquakes, and volcanoes in a simple and easy-to-understand way.
In this post, you will find complete Question–Answer solutions for JKBOSE/NCERT Chapter 2, prepared in clear language for easy learning and quick memorization. The content is well-structured, exam-oriented, and ideal for revision and concept clarity. Students can read online or download free quality notes to make learning Geography effective, enjoyable, and stress-free.
1. Answer the following questions
(i) What are the three layers of the earth?
The Earth has three main layers:
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Crust – the outermost layer where we live.
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Mantle – the thick layer beneath the crust made of semi-molten material.
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Core – the innermost layer, very hot and heavy, made mainly of nickel and iron.
(ii) What is a rock?
A rock is a natural substance made up of one or more minerals that forms part of the Earth’s crust.
(iii) Name three types of rocks.
The three types of rocks are:
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Igneous rocks
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Sedimentary rocks
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Metamorphic rocks
(iv) How are extrusive and intrusive rocks formed?
Extrusive rocks are formed when magma comes out onto the Earth’s surface as lava and cools quickly.
Example: Basalt
Intrusive rocks are formed when magma cools slowly inside the Earth’s crust below the surface.
Example: Granite
(v) What do you mean by a rock cycle?
The rock cycle is the continuous process by which one type of rock changes into another over time due to heat, pressure, weathering, and erosion.
(vi) What are the uses of rocks?
Rocks are very useful in many ways:
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Used as building materials for houses, roads, and bridges
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Used to make cement, bricks, and tiles
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Provide minerals and metals such as iron, copper, and gold
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Used for statues, tools, and decorative items
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Some rocks like coal are used as fuel
(vii) What are metamorphic rocks?
Metamorphic rocks are rocks that are formed when existing rocks change due to heat and pressure inside the Earth.
Example: Marble (formed from limestone)
2. Tick the correct answer
(i) The rock which is made up of molten magma is
(a) Igneous
(b) Sedimentary
(c) Metamorphic
Answer: a) Igneous
(ii) The innermost layer of the earth is
(a) Crust
(b) Core
(c) Mantle
Answer: b) Core
(iii) Gold, petroleum and coal are examples of
(a) Rocks
(b) Minerals
(c) Fossils
Answer: b) Minerals
(iv) Rocks which contain fossils are
(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Igneous rocks
Answer: a) Sedimentary rocks
(v) The thinnest layer of the earth is
(a) Crust
(b) Mantle
(c) Core
Answer: a) Crust
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