LAYERS OF THE EARTH

CONTINETNAL CRUST

CRUST

• Outer layer
• Lithosphere - land
• Hydrosphere - water
• Atmosphere - air
• Continental and oceanic

CONTINENTAL CRUST

• Rocky outer layer
• Composed mostly of granite
• 25 miles deep
• We see mountains, rocks, soil,
• Deserts, lakes, etc.

OCEANIC CRUST

• Crust under oceans about 5 miles thick
• Composed of basalt
• Deeper into crust higher the temperature
• Deepest part hot enough to melt rock
• About 870 degrees Celsius

MANTLE

• Second layer
• Thickest layer -1800 miles
• Heavy rock
• Rocks melt in deepest part - 4400 degrees Celcius
• Convection current moves plates around

OUTER CORE

• Third layer
• Molten iron and nickel
• 1400 miles
• 6,100 degrees Celsius
• (Molten means melted)

INNER CORE

• Fourth layer
• Solid ball of iron and nickel
• 800 miles thick
• 13,000 degrees Fahrenheit