# A Earth Layers Quiz!

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Do you know about Earth's layers? Here is a fantastic quiz to test your knowledge! Most of the Earth is covered with water, making it unique and enabling life to exist. The Earth is divided into three layers that have an essential role on Earth: the core, the mantle, and the crust. These parts have different appearances and compositions. The practice quiz will help you review the different layers of the Earth and help you understand them better. Give it a try!

Questions and Answers
• 1.

### The innermost layer of the Earth is

• A.

Inner core

• B.

Mantle

• C.

Outer core

• D.

Crust

• E.

None of these

Correct Answer
A. Inner core
Explanation
The innermost layer of the Earth is the inner core. This layer is located at the very center of the Earth and is primarily composed of solid iron and nickel. It is the hottest and most dense layer of the Earth, with temperatures reaching up to 5,500 degrees Celsius. The immense pressure in this layer keeps the iron and nickel in a solid state, despite the high temperatures. The inner core plays a crucial role in the Earth's magnetic field and its movement is believed to contribute to the generation of the Earth's magnetic field.

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• 2.

### What is the outermost layer of the Earth?

• A.

Inner core

• B.

Outer core

• C.

Mantle

• D.

Crust

Correct Answer
D. Crust
Explanation
The crust is the outermost layer of the Earth. It is the thinnest layer, ranging from 5-70 kilometers in thickness. It is composed of solid rock and is divided into continental crust and oceanic crust. The crust is the layer that we live on and is where most geological activity occurs, such as earthquakes and volcanic eruptions. It is also the layer where the Earth's surface features, such as mountains and valleys, are formed.

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• 3.

### Which layer of the earth consists of molten?

• A.

Inner core

• B.

Outer core

• C.

Mantle

• D.

Crusts

• E.

Lithosphere

Correct Answer
B. Outer core
Explanation
The outer core of the Earth consists of molten material. This layer is located beneath the mantle and surrounds the solid inner core. The outer core is primarily made up of liquid iron and nickel, and it is responsible for generating the Earth's magnetic field through the movement of this molten material.

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• 4.

### Tell about the solid layer of Earth and its reason.

• A.

The inner core is solid because of the movement of the outer core.

• B.

The inner core is solid because of the low pressure and below-freezing temperatures.

• C.

The inner core is solid because of a balance between hot and cold temperatures.

• D.

The inner core is solid because of the high pressure that drops the temperature inside the core.

• E.

The inner core is solid because of the sky-high pressure and temperatures.

Correct Answer
E. The inner core is solid because of the sky-high pressure and temperatures.
Explanation
The inner core is solid because of the sky-high pressure and temperatures. The immense pressure at the center of the Earth, caused by the weight of the overlying layers, compresses the inner core and prevents it from melting. Additionally, the temperatures at the core are extremely high due to the heat generated by radioactive decay and residual heat from the planet's formation. These extreme pressure and temperature conditions keep the inner core in a solid state.

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• 5.

### Which layers make up the asthenosphere?

• A.

Crust, mantle, and core

• B.

The bottom part of the upper mantle

• C.

Crust and uppermost part of the mantle

• D.

Only the crust

• E.

The asthenosphere does not exist.

Correct Answer
B. The bottom part of the upper mantle
Explanation
The correct answer is the bottom part of the upper mantle. The asthenosphere is a layer located beneath the lithosphere, which is made up of the crust and the uppermost part of the mantle. It is a partially molten and ductile region that allows for the movement of tectonic plates. Therefore, the bottom part of the upper mantle is the correct answer as it accurately describes the composition of the asthenosphere.

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• 6.

### Which layers make up the lithosphere?

• A.

Crust, mantle, and core

• B.

The bottom part of the upper mantle

• C.

Crust and uppermost part of the mantle

• D.

Only the crust

• E.

The lithosphere does not exist.

Correct Answer
C. Crust and uppermost part of the mantle
Explanation
The lithosphere is made up of the crust and the uppermost part of the mantle. The crust is the outermost layer of the Earth, and it is divided into two types: continental crust and oceanic crust. The uppermost part of the mantle, known as the asthenosphere, is a semi-fluid layer beneath the crust. Together, the crust and uppermost mantle form the lithosphere, which is the rigid outer layer of the Earth. This layer is responsible for the movement of tectonic plates and contains the Earth's landforms and geological features.

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• 7.

### Which layers make up the Tabosphere?

• A.

The inner and outer core

• B.

Mantle

• C.

The inner core, outer core, and mantle

• D.

Crusts and mantle

• E.

The Tabosphere does not exist.

Correct Answer
E. The Tabosphere does not exist.
Explanation
The correct answer is that the Tabosphere does not exist. This means that there is no such thing as the Tabosphere. The other options provided in the question are incorrect as they list different layers that actually exist in the Earth's structure, such as the inner and outer core, mantle, and crusts. However, the Tabosphere is not a real layer and therefore does not make up any part of the Earth's structure.

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• 8.

### Which layer lies directly above the inner core?

• A.

Mantle

• B.

Crust

• C.

Outer core

• D.

Lithosphere

Correct Answer
C. Outer core
Explanation
The outer core is the layer that lies directly above the inner core. The inner core is the innermost layer of the Earth, and the outer core surrounds it. The outer core is a liquid layer composed primarily of molten iron and nickel. It is responsible for generating Earth's magnetic field through the movement of its electrically conductive materials. The mantle is the layer above the outer core, followed by the crust and then the lithosphere.

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• 9.

### Which layer lies directly above the outer core?

• A.

Asthenosphere

• B.

Crust

• C.

Mantle

• D.

Inner core

• E.

All of the above

Correct Answer
C. Mantle
Explanation
The mantle lies directly above the outer core. The mantle is the layer of the Earth that is located between the crust and the outer core. It is composed of solid rock and is divided into two parts: the upper mantle and the lower mantle. The upper mantle is relatively rigid, while the lower mantle is more plastic-like. The mantle plays a crucial role in the movement of tectonic plates and the convection currents that drive plate tectonics.

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• 10.

### The mantle makes up ________ of the Earth's volume.

• A.

20 percent

• B.

40 percent

• C.

80 percent

• D.

100 percent

Correct Answer
C. 80 percent
Explanation
The mantle makes up 80 percent of the Earth's volume. The mantle is the layer between the Earth's crust and the core. It is composed of solid rock and is the thickest layer of the Earth. This layer plays a crucial role in the movement of tectonic plates and the convection currents that drive plate tectonics. The remaining 20 percent of the Earth's volume is made up of the crust and the core.

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• Current Version
• Mar 05, 2024
Quiz Edited by
ProProfs Editorial Team
• Apr 25, 2010
Quiz Created by
Tyim

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