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Concept Maps

Earth's Structure — Concept Maps

ICSE · Class 9 · Geography

4 concept maps of Earth's Structure for ICSE Class 9 Geography, each also written out as a text outline. Part of the ICSE Class 9 Geography syllabus.

51 questions34 flashcards4 formulas & key relations5 concepts

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A cross-section diagram showing the Earth's main layers: Crust, Mantle (Upper and Lower), and Core (Outer and Inner), with their approximate depths and key compositions.
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4 Concept Maps

Earth's Structure Overview

Earth's Structure Overview

The map in words

  • Earth Structure
    • Crust
      • SIAL
        • Granite composition
        • Si + Al
        • Density 2.7
        • Discontinuous
      • SIMA
        • Basalt composition
        • Si + Mg
        • Density 2.95
        • Continuous
      • Properties
        • 6-48 km thick
        • Sedimentary top layer
        • Moho boundary
    • Mantle
      • Upper Mantle
        • Asthenosphere
        • Partially molten
        • Source of lava
      • Lower Mantle
        • Mesosphere
        • Solid state
        • High pressure
      • Properties
        • 35-2900 km depth
        • Density 3.3-3.7
        • Mg-Fe silicates
        • Gutenberg boundary
    • Core
      • Outer Core
        • Liquid NIFE
        • 2900-5100 km
        • Temperature 2700C
      • Inner Core
        • Solid NIFE
        • Radius 1400 km
        • Temperature 4300C
      • Properties
        • Density 14.5-16
        • Magnetic field source
        • Extreme pressure

Earth's Three-Layer Structure

Earth's Three-Layer Structure

The map in words

  • Earth Structure
    • Crust
      • Sial Layer
        • Silicon Aluminum
        • Granite Composition
        • Continental Parts
        • Density 2.7
      • Sima Layer
        • Silicon Magnesium
        • Basalt Composition
        • Ocean Floor
        • Density 2.95
      • Properties
        • 6 to 48 km thick
        • Thickest under mountains
        • Thinnest under oceans
    • Mantle
      • Upper Mantle
        • Asthenosphere
        • Partially Molten
        • Source of Magma
      • Lower Mantle
        • Mesosphere
        • Solid State
        • High Pressure
      • Properties
        • 35 to 2900 km depth
        • Density 3.3 to 3.7
        • Magnesium Iron Silicates
    • Core
      • Outer Core
        • Molten State
        • Temperature 2700°C
        • Liquid Iron Nickel
      • Inner Core
        • Solid State
        • Temperature 4000°C
        • Pressure 3.5 million atm
      • Properties
        • Starts at 2900 km
        • Density 14.5 to 16
        • Nife Composition

Earth's Internal Structure Overview

Earth's Internal Structure Overview

The map in words

  • Earth Structure
    • Crust
      • SIAL
        • Continental
        • Granite composition
        • Density 2.7
      • SIMA
        • Oceanic
        • Basalt composition
        • Density 2.95
      • Moho Discontinuity
    • Mantle
      • Upper Mantle
        • Asthenosphere
        • Partially molten
      • Lower Mantle
        • Mesosphere
        • Solid but flows
      • Iron magnesium silicates
      • Convection currents
      • Gutenberg Discontinuity
    • Core
      • Outer Core
        • Liquid state
        • Iron nickel alloy
        • Magnetic field generation
      • Inner Core
        • Solid state
        • Extreme pressure
        • Temperature 6000C

Earth's Interior and Structure

Earth's Interior and Structure

The map in words

  • Earth's Interior and Structure
    • Earth's interior
    • Crust
    • Mantle
    • Core
    • Temperature inside Earth
    • Pressure inside Earth
    • Density inside Earth
    • Indirect evidence

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Frequently Asked Questions

What are the important topics in Earth's Structure for ICSE Class 9 Geography?
Key topics in Earth's Structure include Earth’s Interior: Main Layers, Crust: Lithosphere, Sial, and Sima, Temperature, Pressure, and Density Inside Earth, Mantle: Position, Extent, and Parts. Study these first, then practise questions on each for Class 9 exams.
What do the concept maps for Earth's Structure show?
The 4 maps show how the ideas in Earth's Structure connect: Earth's Structure Overview; Earth's Three-Layer Structure. Each map is also written out as an outline on this page.
How should I revise Earth's Structure for Class 9 exams?
Learn the core ideas first, then work through the 51 practice questions on Earth's Structure. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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