Download Earth Cores Script: Inner core The inner core is the

Earth Cores Script:
Inner core
The inner core is the layer closet to the center of the earth, located approximately 3,200 to 3,960 miles
below the Earth’s crust. The temperature of the inner core reaches over 9,000 F (4,982 C), making it the
hottest spot on the planet. Despite this temperature, the nickel and iron that make up the inner core do
not melt, due to the extreme pressure exerted on it. The inner core, and along with the outer core, are
the source of the Earth’s magnetic field, where electrical currents are generated.
Outer Core
Located 1,800-3,200 miles (2,890 -5,150 km) below the Earth’s crust, the outer core surrounds the inner
core. Reaching a temperature of 4,000-9,000 F (2204-4,982 C), its metal composition remains in liquid
form. The outer core rotates with the Earth, while the enclosed inner core remains still. This contrast
creates the Earth’s magnetic field.
Mantle
The mantle is the Earth’s thickest layer, approximately 1800 miles thick (2,900 km), and making up 80%
of the Earth’s volume. The mantle consists of the upper and lower mantle. The upper mantle is found
between 7miles (10 km) and 190 miles (300 km) beneath the Earth’s crust. The upper mantle is made
of liquid rock, while the lower mantle is more solid, due to the greater pressure. The liquid material, of
the upper mantle, continuously rises and falls, due to the heat that is radiated from the Earth’s core.
Liquid rock, inside the upper mantle, rises on currents of heat, toward the surface. The cooler
temperatures, toward the crust, cause the liquid rock to sink back toward the center. This rising and
falling, known as convection, causes the movement of tectonic plates.
Crust
The crust is the thinnest, and the outer most, layer of the Earth. The crust is classified as oceanic crust
and continental crust. Oceanic crust is the layer of crust underneath the ocean, measuring 4-7 miles
thick (6-11 km). Continental crust is found on land, with a thickness of 20-25 miles (30-40 km). The
crust, along with the Lithosphere, is where earth quake activity occurs.