Podcast
Questions and Answers
Which layer of the Earth is characterized by convection currents that drive tectonic plate movement?
Which layer of the Earth is characterized by convection currents that drive tectonic plate movement?
- Inner core
- Mantle (correct)
- Crust
- Outer core
The Earth's inner core is primarily composed of molten rock.
The Earth's inner core is primarily composed of molten rock.
False (B)
Which of the following best describes the lithosphere?
Which of the following best describes the lithosphere?
- A semi-solid layer in the upper mantle
- The liquid iron and nickel layer
- The molten layer of the Earth
- The rigid outer layer composed of the crust and upper mantle (correct)
The Earth's magnetic field is generated by the movement of molten iron in the ______ core.
The Earth's magnetic field is generated by the movement of molten iron in the ______ core.
Match each layer of the Earth with its approximate temperature:
Match each layer of the Earth with its approximate temperature:
Which type of crust is generally thicker?
Which type of crust is generally thicker?
Oceanic crust is less dense than continental crust.
Oceanic crust is less dense than continental crust.
What two elements are primarily found in the Earth's inner core?
What two elements are primarily found in the Earth's inner core?
Which layer of the Earth is best described as a plastic, semi-solid rock?
Which layer of the Earth is best described as a plastic, semi-solid rock?
The crust has a uniform thickness across the Earth's surface.
The crust has a uniform thickness across the Earth's surface.
Which layer of the earth has a temperature range of $500°C - 2000°C$?
Which layer of the earth has a temperature range of $500°C - 2000°C$?
Name the layer of the Earth that includes the crust and upper mantle.
Name the layer of the Earth that includes the crust and upper mantle.
The outer core is hotter than the inner core.
The outer core is hotter than the inner core.
What percentage of the Earth's surface is made up of continental crust?
What percentage of the Earth's surface is made up of continental crust?
The Earth is broken up into plates that move.
The Earth is broken up into plates that move.
Match the following layers of the Earth with their primary composition:
Match the following layers of the Earth with their primary composition:
What is the approximate thickness of the Earth's molten outer core?
What is the approximate thickness of the Earth's molten outer core?
The asthenosphere is located within the Earth's outer core.
The asthenosphere is located within the Earth's outer core.
The temperature of the Earth's crust ranges from $200°C$ to $400°C$. This is a property of the:
The temperature of the Earth's crust ranges from $200°C$ to $400°C$. This is a property of the:
What is the approximate minimum thickness of the crust?
What is the approximate minimum thickness of the crust?
Flashcards
Crust
Crust
The outermost solid layer of the Earth, composed of rigid rock.
Mantle
Mantle
The layer beneath the crust, consisting of molten rock where convection currents drive tectonic movement.
Asthenosphere
Asthenosphere
A layer of plastic, semi-solid rock in the upper mantle, allowing for the movement of tectonic plates.
Lithosphere
Lithosphere
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Outer Core
Outer Core
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Inner Core
Inner Core
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Oceanic Crust
Oceanic Crust
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Continental Crust
Continental Crust
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Convection Currents
Convection Currents
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Study Notes
- Earth is composed of 4 main layers: crust, mantle, outer core, and inner core.
Inner Core
- Very dense and solid.
- Primarily made of iron (Fe) and nickel (Ni).
- Generates Earth's magnetic field, causing compasses to point north.
- Temperatures can reach approximately 5,200°C.
- Subject to intense pressure.
Outer Core
- Temperatures range from 4,400°C to 6,100°C.
- Molten and approximately 2,300km thick.
Mantle
- Temperatures vary from 500°C to 2,000°C.
- Convection currents in the mantle cause tectonic plate movement.
- Composed of molten rock.
Asthenosphere
- A layer of plastic, semi-solid rock in the upper mantle.
Crust
- Rigid and strong rock layer.
- Temperatures range from 200°C to 400°C.
- Varies in thickness from 5km to 70km.
Lithosphere
- Includes the crust and upper mantle.
- Broken up into tectonic plates that move
Oceanic Crust
- Covers the ocean basins.
- Made of basalt.
- More dense than continental crust.
Continental Crust
- Makes up 40% of the Earth's surface.
- Thicker than oceanic crust.
- Less dense than oceanic crust.
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