Layers of the Earth.ppt

Layers of the Earth Katie Borucki Caitlin Hale Lisa Ruggio Rachel Sekerak The Crust The outer most region of the Earth Mostly made up of basalt and granite Igneous rock Ranges from 5 km to 10 km at sea level, and 10 km to 70 km in the continental regions The least dense of all the Earth’s layers Temperature ranges from air temperature to 900 oC (about 1652 oF) The Mantle A shell made up of dense rock Consists of mostly oxygen, silicon, and magnesium Can be found between 30 and 2,900 km below the Earth’s crust Temperature ranges from 500 oC near the crust to 4000 oC near the core (between 932 and 7232 oF) Where most of the internal heat of the Earth is located The Outer Core 1,800 - 3,200 miles (2,890-5,150 km) below the earths surface Consists mainly of iron, some nickel and about 10% sulfur and oxygen The temperature in the outer core is about 4000-5000 oC (7200 - 9032 oF) Since it is so hot, the outer core is liquid The density of the outer core is between the 10g/cm3 and 12.3g/cm3 Outer core and inner core together cause the earths magnetism Earth’s rotation Outer core rotates while inner core does not and this causes the magnetism Radiates a natural heat to the upper layers Causes convection currents which cause the motion of tectonic plates The Inner Core 3,200 - 3,960 miles (5,150-6,370 km) below the earths surface Mainly consists of iron, nickel and some lighter elements (sulfur, carbon, oxygen, silicon and potassium) The temperature in the inner core is about 5000-6000 oC (9032 - 10832 oF) Even though the inner core is extremely hot, it is solid because of high pressures The average density of the core is about 15g/cm3 Cookie Activity Works Cited “The Core.” ThinkQuest team. 30 Nov. 2006 http://mediatheek.thinkquest.nl/ ~ll125/en/core.htm. The Layer of Earth. Planet Earth. ThinkQuest. 30 Nov. 2006 / 28327/html/universe/ solar_system/planets/earth/interior/layers_of_earth.html. Layers of the Earth. A Teachers Guide to the Geology of Hawaii Volcanoe