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Key points. The Earth has a layered structure made up of the core, the mantle and the crust. Different elements are present in different parts of the Earth’s structure. The crust is made from ...
Aug 21, 2023 · Inner Core: The innermost part of the Earth is its inner core. It’s solid, consisting primarily of iron and nickel, and is incredibly hot, with temperatures soaring up to around 5500°C. This heat is due to the decay of radioactive particles and the immense pressure at such depth. Outer Core: Enveloping the inner core is the outer core.
3 days ago · Earth is part of the " observable universe," the region of space that humans can actually or theoretically observe with the aid of technology. Unlike the observable universe, the universe is possibly infinite.
- Earth is the third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its near-surface environments ar...
- Earth is located in the Orion-Cygnus Arm, one of the four spiral arms of the Milky Way, which lies about two-thirds of the way from the centre of t...
- Earth’s name in English, the international language of astronomy, derives from Old English and Germanic words for ground and earth, and it is the o...
- Earth and the other planets in the solar system formed about 4.6 billion years ago. The early Earth had no ozone layer and no free oxygen, lacked o...
- Viewed from another planet, Earth would appear bright and bluish in colour. In latitudinal belts, swirling white cloud patterns of midlatitude and...
The outermost layer of the Earth is the crust. The crust is the thinest layer. There are two types of crust: oceanic and continental. Continental crust, varying in thickness from 20 to 200 kilometres, is not as dense as its oceanic counterpart.
- Inner Core. Temperature: 5,000°C – 6,000°C. State: Solid. Composition: iron and nickel. The Earth’s inner core is a huge metal ball, 2,500km wide. Made mainly of iron, the temperature of the ball is 5,000°C to 6,000°C – that’s up to 6,000 times hotter than our atmosphere and scorching enough to make metal melt!
- Outer Core. Temperature: 4,000°C – 6,000°C. State: Liquid. Composition: iron, nickel, sulphur and oxygen. This liquid layer of iron and nickel is 5,150km deep.
- Lower Mantle. Temperature: 3,000°C. State: solid. Composition: iron, oxygen, silicon, magnesium and aluminium. The lower mantle is found between 670km and 2,890km below the surface, and is made from solid rock.
- Upper Mantle. Temperature: 1,400°C – 3,000°C. State: liquid / solid. Composition: iron, oxygen, silicon, magnesium and aluminium. This layer is up to 670km below the Earth’s surface.
In between the outer core and crust is the mantle, the thickest layer. This hot, viscous mixture of molten rock is about 1,800 miles (2,900 kilometers) thick and has the consistency of caramel. The outermost layer, Earth's crust, goes about 19 miles (30 kilometers) deep on average on land.
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Nov 11, 2019 · Explainer: Earth — layer by layer. Sizzling heat, unimaginable pressure and some surprise diamonds: It’s all there, deep beneath us. Scientists understand much about Earth’s structural layers — the inner core, core, mantle and crust. Yet there are still great mysteries to solve about our planet’s inner workings. Yuri_Arcurs/iStock/Getty Images Plus
