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The crust
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- The crust is the outermost layer of Earth.
education.nationalgeographic.org/resource/crust/
Nov 11, 2019 · At close to 3,000 kilometers (1,865 miles) thick, this is Earth’s thickest layer. It starts a mere 30 kilometers (18.6 miles) beneath the surface. Made mostly of iron, magnesium and silicon, it is dense, hot and semi-solid (think caramel candy). Like the layer below it, this one also circulates.
Aug 1, 2023 · The crust is the Earth's outermost layer and it's where we live. It has an irregular thickness, varying from about 5 km beneath the oceans to about 30 km beneath the continents. Learn more about the other layers of the Earth, their properties, and facts.
- Crust. Temperature: 475 K (∼200°C) at the surface to 1300 K (∼1000°C) Thickness: 25 miles (32 km) for continental crust and 3-5 miles (8 km) for oceanic crust.
- Upper Mantle. Temperature: 1200 K (∼ 932°C) at the upper boundary with the crust to 1900 K (∼1652 °C) at the boundary with the lower mantle. Thickness: 255 miles (410 km)
- Lower Mantle. Temperature: 1900 K (∼ 1600°C) in the outer regions which can reach up to 4300 K (∼4000°C) at the bottom. Thickness: 1,400 miles (2,250 km)
- Outer Core. Temperature: 4,300 K (4,030°C) in the outer regions to 6,000 K (5,730°C) closest to the inner core. Thickness: 1,355 miles (2,180 km) Density: 9,900 – 12,200 kg/m3.
Apr 25, 2024 · “ Crust ” describes the outermost shell of a terrestrial planet. Our planet ’s thin, 40-kilometer (25-mile) deep crust—just 1 percent of Earth ’s mass—contains all known life in the universe. Earth has three layers: the crust, the mantle, and the core. The crust is made of solid rocks and minerals.
Jan 25, 2019 · The Earth's crust is an extremely thin layer of rock that makes up the outermost solid shell of our planet -- here's why it's exceptionally important.
- Andrew Alden
Dec 15, 2020 · The Earth has four layers: crust, mantle, outer core, and inner core. The crust is the thinnest and solid layer where humans live, while the outer core is the liquid layer that creates the magnetic field.
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3 days ago · Earth’s outermost, rigid, rocky layer is called the crust. It is composed of low-density, easily melted rocks; the continental crust is predominantly granitic rock (see granite), while composition of the oceanic crust corresponds mainly to that of basalt and gabbro.
