Interior of Earth Questions

The interior of the Earth is made up of three parts: crust, mantle, and core. The inner core is found to be in a solid state, and the outer core is in a liquid state. The outermost layer of Earth is called the crust. The crust is relatively cold, thin, and brittle. The next layer is the mantle. It has a density higher than the crust portion with 10 to 200 km thickness.

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Important Interior of Earth Questions with Answers

1. The mantle occupies _____ of the Earth.

1. 15%
2. 1%
3. 84%
4. 48%

Answer: c) 84%

Explanation: Earth’s mantle occupies 84% of space.

2. How is the interior of the Earth classified?

The interior of the Earth is classified into crust, mantle, and core.

3. The outermost solid part of the Earth is known as ______.

1. Core
2. Mantle
3. Crust
4. None of the options

Answer: c)

Explanation: Crust is the outermost layer of the Earth.

4. State true or false: The asthenosphere is the lower portion of the mantle.

1. TRUE
2. FALSE

Answer: b) FALSE

Explanation: The upper portion of the mantle is known as the asthenosphere.

5. Why is the term ‘SIAL’ used to refer to the crust and lithosphere?

Since the major constituent minerals of the crust are silica (Si) and aluminium (Al), it is referred to as SIAL.

6. Which among the following is made of solid rocks?

1. Core
2. Mantle
3. Crust
4. None of the options

Answer: b) Mantle

Explanation: The mantle is made up of solid rocks and is hot.

7. Why is the core also known as the “nife” layer?

The core is called the “nife” layer since it is composed of heavy materials like nickel (Ni) and iron (Fe).

8. In which state is the core of the Earth?

1. Solid
2. Liquid
3. Gas
4. Both solid and liquid

Answer: d) Both solid and liquid

Explanation: The outer core is in a liquid state, and the inner core is in solid state.

9. The uppermost part of the mantle and crust are called the _______.

1. Hydrosphere
2. Atmosphere
3. Lithosphere
4. Exosphere

Answer: c) Lithosphere

Explanation: The crust and the uppermost part of the mantle are known as the lithosphere.

10. Mantle has a density ______ the crust portion.

1. Lower than
2. Higher than

Answer: b) Higher than

Explanation: The density of the mantle is comparatively higher than the crust.

Watch the video below to understand the composition of each layer

Practice Questions

1. What are the various layers of the Earth?
2. How is the interior of Earth classified?
3. List the properties of the crust.
4. List three properties of the mantle.
5. What is meant by the core of the Earth, and how is it classified?