What are Earth’s layers interesting facts?
🔘 Inner core is at the very center of Eart
h.
✔️ Radius: 1,221
km (759 miles)
✔️
Temperature: About 5,200 degrees °C (9,392 degrees Fahrenheit)
✔️
Pressure: Nearly 3.6 million atmospheric pressure (atm)
✔️
State: Solid
✔️
Composition: Mostly iron and some nickel
🔁 Inner core rotates in the same direction as the surface of the planet but rotates ever so slightly faster, completing one extra rotation every 1,000 years or so.
⚫️
Outer core is sandwiched between the inner core and the mantle. The boundary between the inner and outer core is known as
the Lehman Seismic Discontinuity.
✔️
Thickness: 2,300 km (1,400 miles)
✔️
Temperature: Between 4,500 degrees °C and 5,500 degrees °C (8,132 degrees F and 9,932 degrees F).
✔️
State: Fluid
✔️
Composition: Iron and nickel
🧲 The swirling motion of the outer core generates Earth's magnetic field in a process called
geodynamo. Magnetism inside Earth's core is approximately 50 times stronger than it is on the surface. Eventually, the entire core will solidify and Earth's magnetic field will cease to exist. That will be bad news for our planet as the magnetic field protects us from harmful cosmic radiation. We still have a few billions of years of protection left though.
🔴
The mantle can be divided into the
upper and
lower mantle (also known as the mesospheric mantle), with the upper mantle containing two distinct regions: the asthenosphere and the lower portion of the lithosphere.
✔️
Thickness: Approximately 1,800 miles (2,900 km)
✔️
Temperature: 3,700 degrees °C to 1,000 degrees °C (6,692 degrees F to 1,832 degrees F)
✔️
State: Solid
✔️
Composition: Magnesium, silicon and oxygen
🌡 The immense pressure keeps this layer solid despite the high temperatures capable of softening the rocks. Though geologists are yet to agree on a definitive structure of the lower mantle.
💎
Diamonds are forged within the mantle approximately 150 to 200 km (93 to 124 miles) below the surface.
🟥
The asthenosphere is a 110 miles (180 km) thick layer of the upper mantle that sits between the lower mantle and the lithosphere.
✔️
Temperature: 1,500 degrees °C (2,732 degrees F)
✔️
Thickness: 180 km (110 miles)
🪨 Rocks in the asthenosphere are "on the verge" of melting.
🟫
The lithosphere is the outermost layer of Earth, composed of the crust and the brittle part of the upper mantle.
✔️
Depth: 8 to 32 km (5 to 20 miles)
✔️
Temperature: Range from 0 to 500 degrees °C (32 to 932 degrees F).
↔️ The boundary between the brittle part of the upper mantle and the crust (both oceanic and continental) is known as
the Mohorovičić Discontinuity (Moho), which depth varies from about 8 km (5 miles) below oceanic crust to 32 km (20 miles) below continental crust.
Subscribe-
t.me/askmenow