Earth's Structure

Question 1

Structure

Answer 1

Inner core, outer core, mantle, crust

Question 2

Inner core

Answer 2

• 1200 km
• About 5,200° Celsius
• Iron and nickel composition
• Density between 9.9-12.2 g/cm3

Question 3

Outer core

Answer 3

• 2200 km
• Between 4,500° and 5,500° Celsius
• Liquid iron and nickel composition
• Density between 12.6-13 g/cm3

Question 4

Mantle

Answer 4

• About 2900 km thick
• 1000 degrees Celsius - 3700 degrees Celsius
• Iron, aluminum, calcium, sodium, and potassium composition
• Density 4.5g/cm3

Question 5

Crust

Answer 5

• The Continental crust is about 10-70km thick
• The oceanic crust is around 7km thick
• Varies from the air temperature on top to about 870 degrees
• Igneous and metamorphic rocks, shale, sandstone, and limestone composition
• Density 2.6g/cm3