EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the innermost part of Earth below the mantle
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the solid outer layer of Earth above the mantle
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the hot, slow-flowing layer of material beneath the crust
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the layer of Earth on which the tectonic plates move
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Detailed explanation-1: -The earth is made up of three different layers: the crust, the mantle and the core. This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly composed of basalt.
Detailed explanation-2: -The core, mantle, and crust are divisions of Earth based on chemical composition. The lithosphere and asthenosphere are divisions of Earth based on mechanical properties. The three most abundant elements of Earth’s crust are oxygen (46.6% by weight), silicon (27.7%), and aluminum (8.1%).
Detailed explanation-3: -Layers based on chemical composition are the core, mantle and crust. According to mechanical properties, Earth’s layers are the lithosphere, asthenosphere, lower mantle (also known as mesospheric mantle), outer core and inner core, according to Phys.org (opens in new tab).
Detailed explanation-4: -The Earth is divided into three chemical layers: the Core [Inner Core (D) and Outer Core (C)], the Mantle (B) and the Crust (A). The Core is predominantly composed of iron and nickel. Even after 4.5 billion years of cooling, the Earth’s core remains very hot.