what are the main layers of the earth and their characteristic
Answer (2)
Answer:The Earth composed of several distinct layers, each with its own characteristic:1. CrustDescription: The outermost layer, relatively thin compared to other layers.Types: Divided into continental crust and oceanic crust2. MantleDescription: Located beneath the crust, it extends to about 2,900 km deep.Compotition: Composed mainly of silicate minerals rich in iron and magnesium.
Answer:The Earth is composed of several distinct layers, each with its own unique characteristics. Here are the main layers of the Earth and their characteristics:*1. Crust (Outermost layer)*- Thickness: 5-70 km (3-44 miles)- Composition: Rocks and minerals (granite, basalt, sedimentary rocks)- Characteristics: - Solid, rocky layer - Varies in thickness and composition - Forms mountains, valleys, and oceanic and continental plates*2. Mantle*- Thickness: 2,900 km (1,800 miles)- Composition: Hot, viscous rock (silicates, oxides)- Characteristics: - Divided into upper and lower mantle - Convection currents drive plate tectonics - Temperature: 500-3000°C (932-5432°F)*3. Outer Core*- Thickness: 2,250 km (1,400 miles)- Composition: Liquid iron and nickel- Characteristics: - Liquid metal layer - Generates Earth's magnetic field - Temperature: 4,000-6,000°C (7,232-10,832°F)*4. Inner Core*- Thickness: 1,220 km (760 miles)- Composition: Solid iron and nickel- Characteristics: - Solid, iron-nickel alloy - Center of the Earth - Temperature: 5,000-6,000°C (9,032-10,832°F)Additional layers that are sometimes recognized:*5. Lithosphere* (Rigid outer layer)- Thickness: 50-200 km (31-124 miles)- Composition: Uppermost part of the mantle and crust- Characteristics: - Rigid, brittle layer - Breaks into plates that move relative to each other*6. Asthenosphere* (Viscoelastic layer)- Thickness: 100-400 km (62-249 miles)- Composition: Upper mantle- Characteristics: - Viscoelastic, flowing layer - Allows plate motion and deformation*7. Mesosphere* (Lower mantle)- Thickness: 2,500 km (1,553 miles)- Composition: Lower mantle- Characteristics: - Hot, viscous rock - Separates outer core from mantleThese layers are not sharply defined and can vary in thickness and composition depending on location and geological processes.
