Earth's Surface

• Crust - Consists of Rock and Soil, Extends to about 25 miles
• Mantle - 85% of Earth's mass
• Mantle - The fist 50 miles are very hard, and rigid rocks
• Mantle - the next 150 miles are made of extremely hot solid rocks
• Mantle - the next couple miles are solid, sturdy rock materials
• Mantle - 1800 miles thick and also the largest layer
• Outer Core - Consists of Lava
• Lava - made up of iron and nickel
• Outer Core - 3000 miles beneath earth's surface
• Inner Core - 900 miles towards the center of the earth
• Inner Core - Iron and Nickel
• Crust - Less than 1% of earth's volume
• Inner Core - Hottest part of the earth
• Inner Core - As hot as the surface of the sun
• Continental Crust - Felsic
• Continental Crust - 20-70km thick
• Felsic - Rich in Silica
• Continental Crust - Lower Density
• Oceanic Crust - Mafic
• Mafic - Rich in Iron and Magnesium
• Oceanic Crust - 5-10km thick
• Oceanic Crust - High Density
• Subduction - When crusts collides, One goes lower
• Primordial Heat - generated during initial formation of earth
• Radiogenic Heat - generated by the decay of radioactive nuclides