Class 7 Geography chapter 2 questions and answers

 Here are Class 7 Geography Chapter 2: Inside Our Earth questions and answers 

📘 Chapter 2: Inside Our Earth – Questions and Answers

🟢 1. Very Short Answer Questions

Q1. What is the radius of the Earth?
Ans: About 6,371 km.

Q2. What is the innermost layer of the Earth called?
Ans: The core.

Q3. What is the main mineral component of the continental crust?
Ans: Silica and aluminium (SIAL).

Q4. Name two types of igneous rocks.
Ans: Granite and basalt.

Q5. What are metamorphic rocks?
Ans: Rocks formed when existing rocks are subjected to heat and pressure.

🟡 2. Fill in the Blanks

  1. The uppermost layer of the Earth is called the crust.

  2. The Earth’s core is made up of nickel and iron.

  3. Basalt is a type of extrusive igneous rock.

  4. Rocks are made up of minerals.

  5. The process of transformation of one rock into another is called the rock cycle.

🔴 3. True or False

  1. The crust forms the center of the Earth. – False

  2. Core has the highest temperature and pressure. – True

  3. Marble is formed from limestone. – True

  4. Coal is an example of an igneous rock. – False

  5. The oceanic crust is thicker than the continental crust. – False

🔷 4. Short Answer Questions

Q1. What are the three layers of the Earth?
Ans:
The three layers of the Earth are:

  • Crust (outermost)

  • Mantle (middle layer)

  • Core (innermost)

Q2. What is the crust made of?
Ans:
The crust is made up of rocks and minerals. The continental crust mainly consists of silica and aluminium (SIAL), while the oceanic crust has silica and magnesium (SIMA).

Q3. Differentiate between intrusive and extrusive igneous rocks.
Ans:

  • Intrusive igneous rocks form inside the Earth and cool slowly (e.g., granite).

  • Extrusive igneous rocks form on the surface and cool quickly (e.g., basalt).

Q4. How are metamorphic rocks formed?
Ans:
Metamorphic rocks are formed when igneous or sedimentary rocks are changed due to heat and pressure over time (e.g., limestone into marble).

Q5. What is the rock cycle?
Ans:
The rock cycle is the continuous process by which rocks are transformed from one type to another (igneous → sedimentary → metamorphic → again igneous).

🟩 5. Long Answer Question

Q1. Describe the layers of the Earth in detail.
Ans:
The Earth has three main layers:

  • Crust: The outermost layer; it's thin and solid. It's divided into continental and oceanic crust.

  • Mantle: Below the crust; it is semi-solid and extends up to 2,900 km. It contains molten rock or magma.

  • Core: The innermost layer, divided into outer core (liquid) and inner core (solid). It's made up of nickel and iron and is extremely hot.


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