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Questions and Answers
What is the outermost layer of Earth?
What is the outermost layer of Earth?
- Inner Core
- Outer Core
- Crust (correct)
- Mantle
What is the thickness range of Earth's crust?
What is the thickness range of Earth's crust?
5 to 64 kilometers
The crust is solid.
The crust is solid.
True (A)
What percentage of Earth's volume is contained in the mantle?
What percentage of Earth's volume is contained in the mantle?
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What is the thickness of the mantle?
What is the thickness of the mantle?
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The outer core is solid.
The outer core is solid.
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What is the thickness of the outer core?
What is the thickness of the outer core?
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The inner core is solid.
The inner core is solid.
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What is the radius of the inner core?
What is the radius of the inner core?
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Study Notes
Earth's Layers
-
Crust:
- Outermost layer of Earth where life exists.
- Comprised of soil, rock, and water.
- Thickness varies: 5 to 64 kilometers; thickest under continents, thinnest under oceans.
- Comparable in thickness to an egg shell or apple skin.
- State: Solid.
-
Mantle:
- Thickest layer of Earth, containing about 80% of Earth's volume.
- Extends from the base of the crust down to the outer core, approximately 2900 kilometers thick.
- Generally solid, but possesses plasticity, allowing some rock to flow like a thick liquid.
-
Outer Core:
- Begins approximately 2900 kilometers below Earth's surface.
- Majority consists of molten rock, behaving as a hot liquid.
- Thickness is about 2250 kilometers.
- State: Molten liquid.
-
Inner Core:
- Located beneath the outer core, starts at approximately 5150 kilometers deep.
- Extremely dense due to immense pressure.
- Has a radius of about 1300 kilometers.
- State: Solid.
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