LAYERS OF EARTH

EARTHS CRUST

• Humans have been here it starts 5 km into the earth
• Thickness: 5-40 km
• Composition: oxygen, silicon, aluminum, calcium, iron, sodium, potassium, magnesium
• Temperature: 200-400 degrees celcius
• 1% of earths volume

LITHOSPHERE

• Humans have not been here
• 10-100km, located at 10km
• 400 degrees celcius
• Composition: silicate, magnesium, and iron
• 1.5% of earths volume

ASTHENOSPEHERE

• Humans have not been here, located at 100km
• Depth: 100-180km
• 300-500 degrees celcius
• it is 2.5 percent of earths volume
• Composition: iron, magnesium, silica, it is a plastic Solid

MANTLE

• located at 40 km
• Thickness:40-2,900 km
• Composition: silicon, oxygen, iron, magnesium
• Temperature: 500-900 degrees celcius
• 79% of earths volume, humans have not been here

OUTER CORE

• Located at 2,900 km
• Thickness:2,900-5150 km
• Composition: iron, nickel
• Temperature: 2,000- 5,000 degress celcius
• 15.5 % of earths volume, humans have not been here

INNER CORE

• Located at 5,150km
• Thickness: 5150-6371km
• Composition: iron, nickel
• Temperature: 2,000- 5,000 degrees celcius
• 0.7% of earths volume, humans have not been here

SOURCES

• Earth.com
• Nationalgeographic