NCERT Solutions for Class 7 Social Science - Our Environment (Geography) Chapter 2 Inside Our Earth

NCERT Solutions for Class 7 Social Science - Our Environment (Geography) Chapter 2 - Inside Our Earth

Welcome to the Chapter 2 - Inside Our Earth, Class 7 Social Science - Our Environment (Geography) NCERT Solutions page. Here, we provide detailed question answers for Chapter 2 - Inside Our Earth. The page is designed to help students gain a thorough understanding of the concepts related to natural resources, their classification, and sustainable development.

Our solutions explain each answer in a simple and comprehensive way, making it easier for students to grasp key topics Inside Our Earth and excel in their exams. By going through these Inside Our Earth question answers, you can strengthen your foundation and improve your performance in Class 7 Social Science - Our Environment (Geography). Whether you’re revising or preparing for tests, this chapter-wise guide will serve as an invaluable resource.

Exercise 1

Q 1:

(i) What are the three layers of the earth?
(ii) What is a rock?
(iii) Name three types of rocks.
(iv) How are extrusive and intrusive rocks formed?
(v) What do you mean by a rock cycle?
(vi) What are the uses of rocks?
(vii) What are metamorphic rocks?

(i) Three layers of the earth are:

Crust (outermost layer), Mantle (middle layer) and core (innermost layer)

(ii) Any natural mass of minerals matter which makes up the earth’s crust is known as rock. Rocks can be of different colour, size and texture.

(iii) There are three types of rocks:
- Igneous rock of primary rocks
- Sedimentary rock
- Metamorphic rock

(iv) formation of extrusive rocks and intrusive rocks is:
- Extrusive rock are formed when molten magma cools down deep down inside the earth’s surface.
- Intrusive rocks are formed when molten magma cools down inside the earth’s crust.

(v) The change of one type of rock into another type under certain conditions in a cyclic manner is called a rock cycle.

(vi) Following are some uses of rocks:
- They are used as fuels.
- They are used in industries.
- They are used in medicines.
- They are used in fertilizers.
- They are used in making roads, houses, building etc.

(vii) The types of rocks formed when igneous and sedimentary rocks undergo heat and pressure are known as metamorphic rocks.

Q 2:

(i) The rock which is made up of molten magma is
(a) Igneous (b) Sedimentary (c) Metamorphic

(ii) The innermost layer of the earth is
(a) Crust (b) Core (c) Mantle

(iii) Gold, petroleum and coal are examples of
(a) Rocks (b) Minerals (c) Fossils

(iv) Rocks which contain fossils are
(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Igneous rocks

(v) The thinnest layer of the earth is
(a) Crust (b) Mantle (c) Core

(i) (a) igneous
(ii) (b) core
(iii) (b) mineral
(iv) (a) sedimentary rocks
(v) (a) crust

Q 3:

(i) Core (a) Earth’s surface
(ii) Minerals (b) Used for roads and buildings
(iii) Rocks (c) Made of silicon and alumina
(iv) Clay (d) Has definite chemical composition
(v) Sial (e) Innermost layer
(f) Changes into slate
(g) Process of transformation of the rock

(i) Core (e) innermost layer
(ii) minerals (d) has definite chemical composition

(iii) rocks (b) Used for roads and buildings

(iv) clay (f) change into slate
(v) sial (c) made of silicon and alumina

Q 4:

(i) We cannot go to the centre of the earth.
(ii) Sedimentary rocks are formed from sediments.
(iii) Limestone is changed into marble.

(i) We cannot go to the centre of the earth because the temperature as well as pressure is extremely high there. Not only human being but also rocks and metals got melted at this condition.

(ii) Rocks breakdown into smaller fragments under several conditions. These layers of sediments are made when loose sediments are compressed and hardened. These layers of sediments thus form sediments thus forms the sedimentary rocks.

(iii) Ingenious and sedimentary rocks change their size and shape under great pressure and temperature conditions to form metaphoric rocks. The same thing happens with limestone under the effect of heat and pressure change into marble, is an example of metamorphic rock.

Q 5:

For fun.
(i) What are the minerals most commonly used in the following objects?
(ii) Identify some more objects made up of different minerals.

Minerals of most commonly used objects:

1. Karhai Iron

2. Ornaments Gold, silver

3. Pan/tawa Iron

4. Bell Copper, zinc, iron

5. Hammer Iron

6. Lamp Copper, zinc

(ii) Spoon, Keys, Pen, Poles, Pipes, Ships, Planes, etc. are so many objects which are made up of minerals.

Frequently Asked Questions about Inside Our Earth - Class 7 Social Science - Our Environment (Geography)

- 1. How many questions are covered in Inside Our Earth solutions?
- All questions from Inside Our Earth are covered with detailed step-by-step solutions including exercise questions, additional questions, and examples.
- 2. Are the solutions for Inside Our Earth helpful for exam preparation?
- Yes, the solutions provide comprehensive explanations that help students understand concepts clearly and prepare effectively for both board and competitive exams.
- 3. Can I find solutions to all exercises in Inside Our Earth?
- Yes, we provide solutions to all exercises, examples, and additional questions from Inside Our Earth with detailed explanations.
- 4. How do these solutions help in understanding Inside Our Earth concepts?
- Our solutions break down complex problems into simple steps, provide clear explanations, and include relevant examples to help students grasp the concepts easily.
- 5. Are there any tips for studying Inside Our Earth effectively?
- Yes, practice regularly, understand the concepts before memorizing, solve additional problems, and refer to our step-by-step solutions for better understanding.

Exam Preparation Tips for Inside Our Earth

The Inside Our Earth is an important chapter of 7 Social Science - Our Environment (Geography). This chapter’s important topics like Inside Our Earth are often featured in board exams. Practicing the question answers from this chapter will help you rank high in your board exams.

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