2. Structure of the Earth
The Earth's internal structure is composed of three main layers: the crust, mantle, and core. Each layer has distinct characteristics, such as composition, state, and temperature. Various methods, including seismic wave analysis and volcanic activity, are utilized to study these layers, providing insights into geological events like earthquakes and volcanoes, as well as the distribution of natural resources.
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2.2.3Core
The core is the Earth's innermost layer, primarily composed of iron and...
What we have learnt
- The Earth has a layered structure consisting of the crust, mantle, and core.
- Seismic waves, volcanic eruptions, and meteorite studies are key methods for understanding the Earth's interior.
- Grasping the structure of the Earth is crucial for predicting natural disasters and locating resources.
Key Concepts
- -- Crust
- The outermost solid layer of the Earth, composed of rocks, and divided into tectonic plates.
- -- Mantle
- The layer below the crust, made of semi-solid silicate rocks, contributing to tectonic plate movement.
- -- Core
- The innermost layer of the Earth, composed mainly of iron and nickel, divided into outer (liquid) and inner (solid) core.
- -- Seismic Waves
- Waves produced by earthquakes, which provide information about the Earth's internal structure through their behavior in solids and liquids.
- -- Plate Tectonics
- A theory that explains the movement of the Earth's plates, leading to geological phenomena like earthquakes and volcanic activity.
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