# The Structure Of The Earth Quiz Questions And Answers

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Matt Balanda, BS (Aerospace Engineering) |
Physics
Review Board Member
Matt holds a Bachelor's of Science in Aerospace Engineering and Mathematics from the University of Arizona, along with a Master's in Educational Leadership for Faith-Based Schools from California Baptist University. A devoted leader, he transitioned from Aerospace Engineering to inspire students. As the High School Vice-Principal and a skilled Physics teacher at Calvary Chapel Christian School, his passion is nurturing a love for learning and deepening students' connection with God, fostering a transformative educational journey.
, BS (Aerospace Engineering)
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Do you know about the structure of the earth? Our quiz with well-researched questions and answers' will test your knowledge about the same. The structure of the earth refers to the four layers of which the world is comprised. These include the crust, mantle, inner core, and outer core. Each layer has a different chemical composition and physical state and can influence the earth's surface life. Let's see if you can answer all the questions correctly in this quiz. Good Luck!

## The Structure Of The Earth Questions and Answers

• 1.

### What are the four major layers on the Earth's core?

• A.

The inner core, the outer core, the mantle, the crust

• B.

The mantle, the outside core, the indoor core, the layers

• C.

There are no major layers

• D.

The crust, the butter, the mix

A. The inner core, the outer core, the mantle, the crust
Explanation
The Earth's core is composed of four major layers: the inner core, the outer core, the mantle, and the crust. The inner core is the solid, innermost layer made of solid iron and nickel. Surrounding the inner core is the outer core, which is a liquid layer made of molten iron and nickel. Above the outer core is the mantle, a semi-solid layer made of hot, dense rock. Finally, the outermost layer is the crust, which is a thin, solid layer that forms the Earth's surface.

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• 2.

### What is the Earth's core made up of?

• A.

Rock and Salt

• B.

Rock and Metal

• C.

Metal and Gold

• D.

Gold and Salt

B. Rock and Metal
Explanation
The Earth's core is made up of rock and metal. This is supported by scientific evidence and theories that suggest the Earth's core consists of a solid inner core made mostly of iron and nickel, surrounded by a liquid outer core made of molten iron and nickel. The presence of these metallic elements is believed to be responsible for generating the Earth's magnetic field.

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• 3.

### What are the Tectonic Plates?

• A.

The Earth's cover

• B.

When plates slide past each other

• C.

When plates slide past each other

• D.

The Earthâ€™s surface that consist of a number of rigid, but moving pieces or plates

D. The Earthâ€™s surface that consist of a number of rigid, but moving pieces or plates
Explanation
Tectonic plates are the Earth's surface that consist of a number of rigid, but moving pieces or plates. These plates are constantly in motion and can slide past each other. This movement is responsible for various geological phenomena such as earthquakes, volcanic activity, and the formation of mountain ranges.

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• 4.

### What is the earth's mantle composed mainly of?

• A.

Olivine-rich rock

• B.

Salt rocks

• C.

Oily rocks

• D.

Sedimentary rocks

A. Olivine-rich rock
Explanation
The earth's mantle is composed mainly of olivine-rich rock. Olivine is a common mineral found in the mantle and is made up of magnesium, iron, and silica. It is a dense and greenish mineral that makes up a significant portion of the mantle's composition. Olivine-rich rock is formed under high pressure and temperature conditions deep within the earth, and it plays a crucial role in the dynamics and structure of the planet's interior.

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• 5.

### How thick is the mantle in kilometers? (approx)

• A.

200,000

• B.

3,500

• C.

3,000

• D.

8,000

C. 3,000
Explanation
The mantle is a layer of the Earth located between the crust and the core. It is primarily composed of solid rock and extends to a depth of about 2,900 kilometers. Therefore, the correct answer is 3,000, which is the closest option to the actual thickness of the mantle.

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• 6.

### What is the only layer on the mantle?

• A.

The rocks

• B.

The crust

• C.

There is no layer

• D.

Plate tectonic

B. The crust
Explanation
The crust is the correct answer because it is the outermost layer of the Earth's surface. It is composed of solid rocks and is divided into two types: the continental crust, which forms the landmasses, and the oceanic crust, which forms the ocean floor. The mantle, on the other hand, is the layer beneath the crust and is made up of semi-solid rock. Therefore, the crust is the only layer on top of the mantle.

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• 7.

### How do volcanoes form?

• A.

When the fire gets between the earth

• B.

When the magma erupts, it hardens and turns into a volcano

• C.

When magma from earth’s mantle breaks throughout the plates or oozes out at the edge

• D.

By earthquakes

C. When magma from earth’s mantle breaks throughout the plates or oozes out at the edge
Explanation
Volcanoes form when magma from the Earth's mantle breaks through the plates or oozes out at the edge. This process is known as volcanic activity. Magma, which is molten rock, rises to the surface due to pressure and creates a vent or opening. As the magma reaches the surface, it cools and solidifies, forming a volcano. Volcanic activity can also be triggered by earthquakes, as the movement of tectonic plates can cause the release of magma.

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• 8.

### What is a hot spot?

• A.

A fragile spot in one of Earth’s plates and a stationary plume of magma erupts through it

• B.

The Earth’s surface that consist of a number of rigid, but moving pieces or plates

• C.

When plates slide past each other

• D.

When the volcanoes burst and release magma

A. A fragile spot in one of Earth’s plates and a stationary plume of magma erupts through it
Explanation
A hot spot refers to a fragile spot in one of Earth's plates where a stationary plume of magma erupts through it. This explanation suggests that hot spots occur when there is a weak point in the Earth's plates and magma is able to break through the surface. It implies that hot spots are not caused by the movement of plates sliding past each other, but rather by the eruption of magma from a fixed location.

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• 9.

### What is subduction?

• A.

The Earth’s surface that consist of a number of rigid, but moving pieces or plates

• B.

When plates slide past each other

• C.

When two plates crash towards each other, one plate is forced under the other. The underlying plate melts into magma and can erupt through the overlying plate as a volcano

C. When two plates crash towards each other, one plate is forced under the other. The underlying plate melts into magma and can erupt through the overlying plate as a volcano
Explanation
Subduction is the process where two tectonic plates collide and one plate is forced beneath the other. This collision causes the underlying plate to melt into magma, which can then rise and erupt through the overlying plate, forming a volcano.

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• 10.

### What are the agents of erosion?

• A.

Blood, sweat, and tears

• B.

Water, wind, ice, and waves

• C.

Water, ice, Popsicle, and rocks

• D.

Wind, soil and plates tectonic

B. Water, wind, ice, and waves
Explanation
The correct answer is "Water, wind, ice, and waves." These are the agents of erosion because they all have the ability to wear away and transport materials from one place to another. Water can erode through its force and ability to dissolve minerals. Wind can erode by picking up and carrying small particles. Ice can erode through the process of freezing and thawing, which can break apart rocks. Waves can erode coastlines through their constant pounding and movement of sediment. These agents play a significant role in shaping the Earth's surface over time.

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• 11.

### What is Erosion?

• A.

Known as weathering breaks up rocks so that they can be carried away

• B.

The temperature in the core is hotter than the Sun's surface.

• C.

The shifting of the poles

• D.

Have hot magma inside their entire length

A. Known as weathering breaks up rocks so that they can be carried away
Explanation
Erosion is the process by which rock, soil, and other materials are gradually worn away and transported by natural forces such as water, wind, and ice. It is a combination of various physical and chemical processes that break down and transport Earth's surface materials. Erosion often works in conjunction with weathering, which is the process of breaking down rocks and minerals into smaller particles without transporting them.

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• 12.

### What do mid-ocean ridges have

• A.

Shallow valleys along their entire length

• B.

Deep valleys along most of the length

• C.

Deep valleys along their entire length

C. Deep valleys along their entire length
Explanation
Mid-ocean ridges have deep valleys along their entire length. This is because mid-ocean ridges are formed by the divergence of tectonic plates, where new oceanic crust is created. As the plates move apart, magma rises to fill the gap and solidifies, creating new crust. The process also creates deep valleys, known as rift valleys, along the length of the ridge. These valleys are formed as the crust is pulled apart and the underlying mantle is exposed. Therefore, the correct answer is that mid-ocean ridges have deep valleys along their entire length.

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• 13.

### What is another name for diverging boundaries?

• A.

There is no other name

• B.

Spending centers

• C.

Loose centers

B. Spending centers
Explanation
Another name for diverging boundaries is "spreading centers." Diverging boundaries, also known as spreading centers or divergent plate boundaries, are places on Earth's surface where tectonic plates move away from each other, allowing magma from the mantle to rise, cool, and solidify, forming new crust. These boundaries are often associated with mid-ocean ridges, such as the Mid-Atlantic Ridge, where the seafloor spreading process occurs. Spreading centers play a crucial role in the theory of plate tectonics and contribute to the continuous reshaping of Earth's surface over millions of years.

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• 14.

### What are sliding boundaries?

• A.

When plates slide past each other

• B.

When plates collide into each other

• C.

When plates move away from each other

A. When plates slide past each other
Explanation
Sliding boundaries refer to the movement of tectonic plates as they slide past each other. This type of plate boundary is known as a transform boundary. Transform boundaries are characterized by horizontal movement where the plates grind against each other in opposite directions. This movement can result in earthquakes as the plates become locked and release energy when they finally slip past each other.

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• 15.

### What does Converging Boundaries(Collision) cause?

• A.

Causes a form of converging boundaries that plunges down under another overriding plate.

• B.

Causes the lithosphere at the boundary to be pushed upward in a mountain or range.

• C.

Causes a break or crack in the earthâ€™s crust

B. Causes the lithosphere at the boundary to be pushed upward in a mountain or range.
Explanation
Converging boundaries cause mountain formation, volcanism, and lithosphere recycling. When tectonic plates collide, the denser plate subducts beneath the lighter plate, leading to the creation of volcanoes and volcanic arcs. The compression of the Earth's crust results in uplifted mountain ranges, while subduction recycles lithosphere material into new crust. These processes shape Earth's surface over time.

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Matt Balanda |BS (Aerospace Engineering) |
Physics
Matt holds a Bachelor's of Science in Aerospace Engineering and Mathematics from the University of Arizona, along with a Master's in Educational Leadership for Faith-Based Schools from California Baptist University. A devoted leader, he transitioned from Aerospace Engineering to inspire students. As the High School Vice-Principal and a skilled Physics teacher at Calvary Chapel Christian School, his passion is nurturing a love for learning and deepening students' connection with God, fostering a transformative educational journey.

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• Apr 13, 2010
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