Earth's Structure
ICSE · Class 9 · Geography
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What are the three main parts of the Earth?
What does the word Lithosphere mean?
Which two layers make up the crust?
Sial is mainly composed of which elements?
Sample Questions
Sima is mainly composed of which elements?
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Silica and magnesium
Sima is the lower continuous layer of the crust and is rich in silica and magnesium.
The crust is thickest beneath which feature?
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The mountains
The crust is thickest beneath mountains and thinnest under the ocean.
What is the average density of the Earth?
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5.5
The average density of the Earth is 5.5.
Which layer lies between the crust and the core?
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Mantle
The mantle is the layer between the crust and the core.
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