Earth's Surface Composition

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Questions and Answers

What are the three primary compositional layers of the Earth's surface?

  • Crust, Mantle, Outer Core
  • Crust, Mantle, Core (correct)
  • Lithosphere, Asthenosphere, Mesosphere
  • Crust, Asthenosphere, Inner Core

Which layer of the Earth is the outermost and contains the entire crust?

  • Outer Core
  • Mesosphere
  • Lithosphere (correct)
  • Asthenosphere

What is the rigid layer of the Earth's composition due to high pressure?

  • Asthenosphere
  • Mesosphere (correct)
  • Inner Core
  • Outer Core

Which layer of the Earth is a liquid due to extremely high temperatures?

<p>Outer Core (D)</p> Signup and view all the answers

What is the solid layer of the Earth's composition due to high pressure?

<p>Inner Core (D)</p> Signup and view all the answers

What is the theory that states the Earth's lithosphere is divided into large moving plates?

<p>Plate Tectonics Theory (A)</p> Signup and view all the answers

How are the Earth's plates described in the Plate Tectonics Theory?

<p>Moving (A)</p> Signup and view all the answers

How fast do the Earth's lithospheric plates move on average?

<p>1-2 inches per year (A)</p> Signup and view all the answers

What is the process by which new land is formed through plate tectonics?

<p>Heated magma rising through cracks in the oceanic crust (D)</p> Signup and view all the answers

How is new land formed according to scientists studying plate tectonics?

<p>By heated magma rising through cracks in the oceanic crust (C)</p> Signup and view all the answers

Flashcards

Earth's Compositional Layers

The three primary layers are Crust, Mantle, and Core.

Lithosphere

The lithosphere is the outermost layer of the Earth, including the entire crust.

Mesosphere

The mesosphere is the rigid layer of the Earth's composition due to high pressure.

Outer Core

The outer core is a liquid layer due to extremely high temperatures.

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Inner Core

The inner core is the solid layer of the Earth's composition due to high pressure.

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Plate Tectonics Theory

A theory stating the Earth's lithosphere is divided into large moving plates.

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Movement of Earth's Plates

In Plate Tectonics Theory, Earth's plates are described as moving.

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Lithospheric Plate Movement Speed

Lithospheric plates move at an average speed of 1-2 inches per year.

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Formation of New Land

New land is formed by heated magma rising through cracks in the oceanic crust.

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Oceanic Crust Cracks

Heated magma rising through cracks in the oceanic crust creates new land.

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Study Notes

Earth's Surface Composition

  • The Earth's surface has three primary compositional layers: Crust, Mantle, and Outer Core.

Lithosphere and Asthenosphere

  • The Lithosphere is the outermost layer of the Earth, containing the entire Crust.
  • The Asthenosphere is a layer of the Earth beneath the Lithosphere, characterized by high temperatures and pressure.

Inner Core and Outer Core

  • The Inner Core is a solid layer of the Earth's composition, due to high pressure.
  • The Outer Core is a liquid layer of the Earth, due to extremely high temperatures.

Plate Tectonics Theory

  • The Plate Tectonics Theory states that the Earth's Lithosphere is divided into large moving plates.
  • The plates move at an average rate of 15-20 inches per year.
  • The process by which new land is formed through plate tectonics is the heated magma rising through cracks in the oceanic crust.

Key Characteristics of Plates

  • The Earth's plates are described as moving in the Plate Tectonics Theory.
  • New land is formed through volcanic eruptions, specifically by heated magma rising through cracks in the oceanic crust.

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