escription of the four main layers of the earth
Answers
Answer:
See the picture below to see the four main layers of the earth: the crust, mantle, outer core, and inner core. The crust is the thin outer later of the Earth where we live. ... The continental crust is made up of rocks that consist primarily of silica and alumina called the "sial".
Answer:1. Crust
Earth's crust is what we walk on every day. It is the thin (relatively) outermost layer that wraps around the Earth and ranges in temperature from 500 to 1,000°C. The crust is split into two types, continental and oceanic. Earth's crust is 5 to 70 km thick.
Continental crust makes up the land on Earth, it is thicker (35 - 70 km), less dense and mostly made up of the rock granite.
Oceanic crust makes up most of the ocean, it is thinner (5 - 7 km), denser and mostly made up of the rock basalt.
Explanation:2. Mantle
Just below the crust lies the mantle. The mantle is semi-liquid, sort of like a malleable plastic and makes up 84% of Earth's volume. Earth's mantle is 2,900 km thick and is broken down into 3 main zones, the lithosphere, asthenosphere, and mesosphere.
3. Outer Core
The outer core lies beneath the mantle. This liquid iron and nickel layer spins as the planet rotates and creates Earth's magnetic field. This magnetic field helps to protect us from the Sun's solar radiation. The outer core is 2,200 km thick and very hot at up to 6,100°C!
Inner Core
The inner core is the deepest layer on Earth. It is also made up of iron and nickel but the pressure is so high that it is no longer liquid. The temperatures in the inner core are as hot as the surface of the sun, about 5505 °C. Earth's inner core is 1,230 to 1,530 km thick.